Sigmodontinae
Encyclopedia
The subfamily Sigmodontinae is one of the most diverse groups of mammals. It includes New World rats
Rat
Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus...

 and mice
Mouse
A mouse is a small mammal belonging to the order of rodents. The best known mouse species is the common house mouse . It is also a popular pet. In some places, certain kinds of field mice are also common. This rodent is eaten by large birds such as hawks and eagles...

, with at least 376 species. Many authorities include the Neotominae
Neotominae
Neotominae is a subfamily of the family Cricetidae. It consists of four tribes, 16 genera, and many species of New World rats and mice, predominantly found in North America. Among them are the well-known deer mice, white-footed mice, packrats, and grasshopper mice.Neotomines are related to the...

 and Tylomyinae
Tylomyinae
The subfamily Tylomyinae consists of several species of New World rats and mice including the vesper and climbing rats. They are not as well known as their relatives in the subfamilies Sigmodontinae and Neotominae...

 as part of a larger definition of Sigmodontinae. When those genera are included, the species count numbers at least 508. Their distribution includes much of the New World
New World
The New World is one of the names used for the Western Hemisphere, specifically America and sometimes Oceania . The term originated in the late 15th century, when America had been recently discovered by European explorers, expanding the geographical horizon of the people of the European middle...

, but the genera are predominantly South America
South America
South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

n, such as brucies. They invaded South America from Central America as part of the Great American Interchange
Great American Interchange
The Great American Interchange was an important paleozoogeographic event in which land and freshwater fauna migrated from North America via Central America to South America and vice versa, as the volcanic Isthmus of Panama rose up from the sea floor and bridged the formerly separated continents...

 near the end of the Miocene
Montehermosan
The Montehermosan age is a period of geologic time within the Miocene epoch of the Neogene used more specifically with South American Land Mammal Ages. It follows the Huayquerian and precedes the Chapadmalalan age....

, about 5 million years ago. Sigmodontines proceeded to diversify explosively in the formerly isolated continent. They inhabit many of the same ecological niche
Ecological niche
In ecology, a niche is a term describing the relational position of a species or population in its ecosystem to each other; e.g. a dolphin could potentially be in another ecological niche from one that travels in a different pod if the members of these pods utilize significantly different food...

s that the Murinae
Murinae
The Old World rats and mice, part of the subfamily Murinae in the family Muridae, comprise at least 519 species. This subfamily is larger than all mammal families except the Cricetidae and Muridae, and is larger than all mammal orders except the bats and the remainder of the...

 occupy in the Old World
Old World
The Old World consists of those parts of the world known to classical antiquity and the European Middle Ages. It is used in the context of, and contrast with, the "New World" ....

.

The "Thomasomyini" from the Atlantic Forest of Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 are generally thought to be not especially related to the "real" Thomasomyini from the northern Andes
Andes
The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...

 and Amazonia. The genera Wiedomys
Wiedomys
Wiedomys is a genus of South American rodents in the family Cricetidae.It contains the following species:* Cerrado Red-nosed Mouse * Red-nosed Mouse...

and Sigmodon are generally placed in their own tribe, and the "phyllotines" Irenomys, Punomys
Punomys
Punomys is a genus of rodent in the family Cricetidae.It contains the following species:* Eastern Puna Mouse * Puna Mouse...

, Euneomys
Euneomys
Euneomys is a genus of rodent in the family Cricetidae.It contains the following species:* Patagonian Chincilla Mouse * Burrowing Chincilla Mouse * Biting Chincilla Mouse...

, and Reithrodon
Reithrodon
Reithrodon is a genus of rodent in the family Cricetidae.It contains the following species:* Bunny Rat * Naked-soled Conyrat...

are considered incertae sedis.

The Sigmodontinae are divided into a number of tribes and genera:
  • SUBFAMILY SIGMODONTINAE
    • Tribe Sigmodontini
      • Genus Sigmodon - Cotton Rats
        • Subgenus Sigmodon
          • Sigmodon hispidus species group
            • Allen's Cotton Rat
              Allen's Cotton Rat
              Allen's Cotton Rat is a species of rodent in the family Cricetidae.It is found only in Mexico.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

              , Sigmodon alleni
            • Arizona Cotton Rat
              Arizona Cotton Rat
              The Arizona cotton rat or Colorado River cotton rat is a species of rodent in the family Cricetidae. It is found in Mexico and the United States.-Description:...

              , Sigmodon arizonae
            • Southern Cotton Rat
              Southern cotton rat
              The southern cotton rat, Sigmodon hirsutus, is a rodent species in the family Cricetidae. It is found in southern Chiapas in Mexico through Central America, except for Belize, and as far east as northern Colombia and Venezuela. It lives in tropical rainforest, dry forest and savanna, as well as in...

              , Sigmodon hirsutus
            • Hispid Cotton Rat
              Hispid Cotton Rat
              The Hispid Cotton Rat is a rodent species long thought to occur in parts of South America, Central America, and southern North America. However, recent taxonomic revisions, based on mitochondrial DNA sequence data, have split this widely distributed species into three separate species. Carroll et...

              , Sigmodon hispidus
            • Jaliscan Cotton Rat
              Jaliscan Cotton Rat
              The Jaliscan Cotton Rat is a species of rodent in the family Cricetidae.It is found only in Mexico.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

              , Sigmodon mascotensis
            • Yellow-nosed Cotton Rat
              Yellow-Nosed Cotton Rat
              The yellow-nosed cotton rat is a species of rodent in the family Cricetidae. Its range extends from the eastern side of the Sierra Madre Occidental to central Durango and western Coahuila in Mexico, and from Arizona to New Mexico and scattered desert ranges of the Mesa del Norte in Trans-Pecos...

              , Sigmodon ochrognathus
            • Miahuatlán Cotton Rat
              Miahuatlán cotton rat
              The Miahuatlán cotton rat, Sigmodon planifrons, is a rodent species in the family Cricetidae. It is found only on the Pacific slope of the Sierra de Miahuatlán in the Mexican state of Oaxaca, where it lives in deciduous tropical forest....

              , Sigmodon planifrons
            • Toltec Cotton Rat
              Toltec cotton rat
              The Toltec cotton rat, Sigmodon toltecus, is a rodent species in the family Cricetidae. It is found in eastern Mexico from the Rio Grande to the Yucatán Peninsula, as well as in Belize and northern Guatemala. It prefers moist grassland habitat. While long thought to be a subspecies of S...

              , Sigmodon toltecus
            • Montane Cotton Rat
              Montane Cotton Rat
              The Montane Cotton Rat, Sigmodon zanjonensis, is a rodent species in the family Cricetidae. It is found in the highlands of Chiapas, Mexico and Guatemala. The eastern and southern limits of its range are as of yet undetermined....

              , Sigmodon zanjonensis
          • Sigmodon fulviventer species group
            • Tawny-bellied Cotton Rat
              Tawny-Bellied Cotton Rat
              The Tawny-bellied Cotton Rat is a species of rodent in the family Cricetidae.It is found in Mexico and in Arizona and New Mexico in the United States.-References:...

              , Sigmodon fulviventer
            • Unexpected Cotton Rat
              Unexpected Cotton Rat
              The Unexpected Cotton Rat is a species of rodent in the family Cricetidae. It is found only in Ecuador at elevations of 3500 to 4000 m, where it has been found in association with streams and marshes....

              , Sigmodon inopinatus
            • White-eared Cotton Rat
              White-Eared Cotton Rat
              The White-eared Cotton Rat is a species of rodent in the family Cricetidae.It is found only in Mexico.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

              , Sigmodon leucotis
            • Peruvian Cotton Rat
              Peruvian Cotton Rat
              The Peruvian Cotton Rat is a species of rodent in the family Cricetidae.It is found in Ecuador and Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

              , Sigmodon peruanus
        • Subgenus Sigmomys
          • Alston's Cotton Rat
            Alston's Cotton Rat
            Alston's Cotton Rat, Sigmodon alstoni, is a rodent species from South America. It is found in Brazil, Colombia, Guyana, Suriname, and Venezuela, where it inhabits lowland savannas....

            , Sigmodon alstoni
    • Tribe Ichthyomyini
      Ichthyomyini
      Ichthyomyini is a tribe of New World rats and mice in the subfamily Sigmodontinae. The species within this tribe share the characteristic of all being fish-eating rodents.*Anotomys - Ecuadorian Fish-eating Rat*Chibchanomys - Chibchan Water Mouse...

      • Genus Anotomys - Ecuadorian Fish-eating Rat
        • Aquatic Rat
          Aquatic Rat
          The Aquatic Rat, Ecuador Fish-Eating Rat, or Fish-Eating Rat is a species of rodent in the family Cricetidae. It is the only species in the genus Anotomys.It is found only in Ecuador....

          , Anotomys leander
      • Genus Chibchanomys
        Chibchanomys
        Chibchanomys is a genus of rodent in the family Cricetidae.It contains the following species:* Las Cajas Water Mouse * Chibchan Water Mouse...

        - Water Mice
        • Las Cajas Water Mouse
          Las Cajas Water Mouse
          The Las Cajas Water Mouse is a species of rodent in the family Cricetidae. It is endemic to the Cajas National Park in Ecuador. Its natural habitat is the high grassland of the park, where it lives near streams, eating small fish and large invertebrates....

          ,
          Chibchanomys orcesi
        • Chibchan Water Mouse
          Chibchan Water Mouse
          The Chibchan Water Mouse is a species of rodent in the family Cricetidae.It is found in the Andean highlands of Colombia, Peru, and Venezuela....

          ,
          Chibchanomys trichotis
      • Genus Ichthyomys
        Ichthyomys
        Ichthyomys is a genus of semiaquatic rodents in the family Cricetidae.It contains the following species:* Crab-eating Rat * Pittier's Crab-eating Rat...

        - Crab-eating Rats
        • Crab-eating Rat
          Crab-eating Rat
          The Crab-eating Rat is a species of semiaquatic rodent in the family Cricetidae.It is found in Colombia, Ecuador, and Venezuela.Its natural habitats are rivers and swamps....

          ,
          Ichthyomys hydrobates
        • Pittier's Crab-eating Rat
          Pittier's Crab-eating Rat
          Pittier's Crab-eating Rat is a species of semiaquatic rodent in the family Cricetidae.It is found only in Venezuela....

          ,
          Ichthyomys pittieri
        • Stolzmann's Crab-eating Rat
          Stolzmann's Crab-eating Rat
          Stolzmann's Crab-eating Rat is a species of rodent in the family Cricetidae. It ist found in Ecuador and Peru. The species is believed to be nocturnal and semiaquatic, and has been found at an elevation range of 900 to 1700 m. A survey in 2010 indicates that it has become a pest at local fish...

          ,
          Ichthyomys stolzmanni
        • Tweedy's Crab-eating Rat
          Tweedy's Crab-eating Rat
          Tweedy's Crab-Eating Rat is a species of rodent in the family Cricetidae.It is found in two disjoint regions in western Ecuador and central Panama. The species is found near fast-flowing streams in primary and secondary forest, and is known from elevations of 900 to 1700 m...

          ,
          Ichthyomys tweedii
      • Genus Neusticomys
        Neusticomys
        Neusticomys is a genus of semiaquatic South American rodents in the family Cricetidae.It contains the following species:* Ferreira's Fish-eating Rat * Montane Fish-eating Rat...

        - Fish-eating Rats
        • Ferreira's Fish-eating Rat
          Ferreira's fish-eating rat
          Ferreira's fish-eating rat is a species of rodent in the family Cricetidae.It is known only from one lowland tropical rainforest location in the Brazilian state of Mato Grosso. It is named after 18th-century Brazilian naturalist Alexandre Rodrigues Ferreira....

          ,
          Neusticomys ferreirai
        • Montane Fish-eating Rat
          Montane Fish-eating Rat
          The Montane Fish-eating Rat is a species of semiaquatic rodent in the family Cricetidae. It is distributed throughout the Andes Mountains of western Colombia and northern Ecuador.-References:...

          ,
          Neusticomys monticolus
        • Musso's Fish-eating Rat
          Musso's Fish-eating Rat
          Musso's Fish-eating Rat is a species of rodent in the family Cricetidae.It is found only in Venezuela.-References:*Baillie, J. 1996. . Downloaded on 9 July 2007....

          ,
          Neusticomys mussoi
        • Oyapock's Fish-eating Rat
          Oyapock's Fish-eating Rat
          Oyapock's Fish-eating Rat is a species of rodent in the family Cricetidae.It is found in French Guiana and Brazil.-References:...

          ,
          Neusticomys oyapocki
        • Peruvian Fish-eating Rat
          Peruvian Fish-eating Rat
          The Peruvian Fish-eating Rat is a species of semiaquatic rodent in the family Cricetidae. It is found only in eastern Peru, where it is known from locations at elevations from 200 to 400 m.-References:...

          ,
          Neusticomys peruviensis
        • Venezuelan Fish-eating Rat
          Venezuelan Fish-eating Rat
          The Venezuelan Fish-eating Rat is a species of rodent in the family Cricetidae.It is found in Guyana and Venezuela.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

          ,
          Neusticomys venezuelae
      • Genus Rheomys
        Rheomys
        Rheomys is a genus of semiaquatic rodents in the family Cricetidae.It contains the following species:* Mexican Water Mouse * Goldman's Water Mouse * Thomas's Water Mouse...

        - Water Mice
        • Mexican Water Mouse
          Mexican Water Mouse
          The Mexican Water Mouse is a species of rodent in the family Cricetidae.It is found only in Mexico....

          ,
          Rheomys mexicanus
        • Goldman's Water Mouse
          Goldman's Water Mouse
          Goldman's Water Mouse is a species of rodent in the family Cricetidae.It is found in Costa Rica and Panama....

          ,
          Rheomys raptor
        • Thomas's Water Mouse
          Thomas's Water Mouse
          Thomas's Water Mouse is a species of rodent in the family Cricetidae.It is found in El Salvador, Guatemala, and Mexico....

          ,
          Rheomys thomasi
        • Underwood's Water Mouse
          Underwood's Water Mouse
          Underwood's Water Mouse is a species of rodent in the family Cricetidae.It is found in Costa Rica and Panama....

          ,
          Rheomys underwoodi
    • Oryzomyalia
      • Tribe Oryzomyini
        Oryzomyini
        Oryzomyini is a tribe of rodents in the subfamily Sigmodontinae of family Cricetidae. It includes about 120 species in about thirty genera, distributed from the eastern United States to the southernmost parts of South America, including many offshore islands...

        • Genus Aegialomys
          Aegialomys
          Aegialomys is a genus of oryzomyine rodents from the lowlands and mountains of western Peru and Ecuador, including the Galápagos Islands. The species in this genus have historically been placed in Oryzomys, but according to cladistic research, the genus is more closely related to a group...

          • Galápagos Rice Rat
            Galapagos Rice Rat
            Aegialomys galapagoensis, also known as the Galápagos Rice Rat or Galápagos Oryzomys, is a species of rodent in the family Cricetidae from the Galápagos Islands. It belongs to the genus Aegialomys in tribe Oryzomyini, but was previously placed in Oryzomys as Oryzomys galapagoensis. Its natural...

            ,
            Aegialomys galapagoensis
          • Yellowish Rice Rat
            Yellowish Rice Rat
            Aegialomys xanthaeolus, also known as the Yellowish Oryzomys or Yellowish Rice Rat, is a species of rodent in the family Cricetidae. It belongs to the genus Aegialomys in tribe Oryzomyini, which was not recognized as distinct from Oryzomys until 2006. It is found in coastal Ecuador and Peru...

            ,
            Aegialomys xanthaeolus
        • Genus Amphinectomys - Ucayali Water Rat
          • Ucayali Water Rat
            Ucayali Water Rat
            Amphinectomys savamis, also known as the Ucayali Water Rat or Amphibious Rat, is a rodent from Peruvian Amazonia. It is placed as the only member of genus Amphinectomys in the tribe Oryzomyini of family Cricetidae...

            ,
            Amphinectomys savamis
        • Genus Cerradomys
          Cerradomys
          Cerradomys is a genus of oryzomyine rodents from eastern Bolivia, Paraguay, and central Brazil found in cerrado, Caatinga and Gran Chaco habitats. The species in this genus have historically been placed in Oryzomys, but according to cladistic research, they are not more closely related to the type...

          • Cerradomys langguthi
            Cerradomys langguthi
            Cerradomys langguthi is a species of rodent from South America in the genus Cerradomys. It occurs only in northeastern Brazil and was formerly included in C. subflavus.-Literature cited:...

          • Cerradomys maracajuensis
          • Cerradomys marinhus
          • Cerradomys scotti
            Cerradomys scotti
            Cerradomys scotti, also known as Lindbergh's Oryzomys, is a rodent species from South America in the genus Cerradomys. It is terrestrial and is found in the cerrado ecozone of south central Brazil, Bolivia and Paraguay...

            (including Oryzomys andersoni)
          • Terraced Rice Rat
            Terraced Rice Rat
            Cerradomys subflavus, also known as the Terraced Rice Rat or Flavescent Oryzomys, is a rodent species from South America in the genus Cerradomys. It is found in the states of Goiás, São Paulo, and Minas Gerais, Brazil...

            ,
            Cerradomys subflavus
          • Cerradomys vivoi
            Cerradomys vivoi
            Cerradomys vivoi is a species of rodent from South America in the genus Cerradomys. It occurs only in eastern Brazil, in the states of Bahia, Goiás, and Sergipe, and was formerly included in C. subflavus.-Literature cited:...

        • Genus Drymoreomys
          Drymoreomys
          Drymoreomys is a genus of rodents in the tribe Oryzomyini, from the Atlantic Forest of Brazil. The single species, D. albimaculatus, is known only from the states of São Paulo and Santa Catarina and was not named until 2011. It lives in the humid forest on the eastern slopes of the Serra do...

          • Drymoreomys albimaculatus
        • Genus Eremoryzomys
          • Grey Rice Rat, Eremoryzomys polius
        • Genus Euryoryzomys
          Euryoryzomys
          Euryoryzomys is a genus of rodents in the tribe Oryzomyini of family Cricetidae. It includes six species, which are distributed in South America. Until 2006, its members were included in the genus Oryzomys, but they are not closely related to the type species of that genus, and therefore they were...

          • Emmons's Rice Rat
            Emmons's Rice Rat
            Euryoryzomys emmonsae, also known as Emmons's Rice Rat or Emmons' Oryzomys, is a rodent from Amazonian Brazil in the genus Euryoryzomys of the family Cricetidae. Initially misidentified as E. macconnelli or E. nitidus, it was formally described in 1998. A rainforest species, it may be...

            ,
            Euryoryzomys emmonsae
          • Monster Rice Rat
            Monster Rice Rat
            Euryoryzomys lamia, also known as the Buffy-sided Oryzomys or Monster Rice Rat is a species of rodent in the genus Euryoryzomys of family Cricetidae. It is found only in central Brazil, where it lives in the cerrado.-Literature cited:...

            ,
            Euryoryzomys lamia
          • Big-headed Rice Rat, Euryoryzomys legatus
          • MacConnell's Rice Rat
            MacConnell's Rice Rat
            Euryoryzomys macconnelli, also known as MacConnell's Rice Rat or MacConnell's Oryzomys, is a rodent species from South America. It is found in Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela, where it lives in lowland tropical rainforest...

            ,
            Euryoryzomys macconnelli
          • Elegant Rice Rat
            Elegant Rice Rat
            Euryoryzomys nitidus, also known as the Elegant Oryzomys or Elegant Rice Rat, is a rodent species in the genus Euryoryzomys of family Cricetidae. It was previously known as Oryzomys nitidus, but is not closely related to Oryzomys as that genus is now constructed...

            ,
            Euryoryzomys nitidus
          • Russet Rice Rat, Euryoryzomys russatus
        • Genus Handleyomys
          Handleyomys
          Handleyomys is a genus of Central and South American rodents in the tribe Oryzomyini of family Cricetidae. It was first described in 2002 to include two species from the Colombian Andes which were previously included in distinct and unrelated genera, Aepeomys and Oryzomys, but which turned out to...

          • Alfaro's Rice Rat
            Alfaro's Rice Rat
            Handleyomys alfaroi, also known as Alfaro's Rice Rat or Alfaro's Oryzomys, is a species of rodent in the genus Handleyomys of family Cricetidae. It is found in Belize, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, and Panama. It was previously included in...

            ,
            Handleyomys alfaroi
          • Chapman's Rice Rat
            Chapman's Rice Rat
            Handleyomys chapmani, also known as Chapman's Oryzomys or Chapman's Rice Rat, is a species of rodent in the genus Handleyomys of family Cricetidae. It is found only in Mexico...

            ,
            Handleyomys chapmani
          • Dusky-footed Handley's Mouse, Handleyomys fuscatus
          • Colombian Rice Rat
            Colombian Rice Rat
            Handleyomys intectus, also known as the White-footed Handley's Mouse or Colombian Rice Rat, is a species of rodent in the genus Handleyomys of family Cricetidae. It occurs only in Colombia...

            ,
            Handleyomys intectus
          • Black-eared Rice Rat
            Black-Eared Rice Rat
            Handleyomys melanotis, also known as the Black-eared Oryzomys or Black-eared Rice Rat, is a species of rodent in the genus Handleyomys of family Cricetidae. It is found in coastal lowland forest in western Mexico.-Literature cited:...

            ,
            Handleyomys melanotis
          • Striped Rice Rat
            Striped Rice Rat
            Handleyomys rhabdops, also known as the Highland Oryzomys or Striped Rice Rat, is a species of rodent in the genus Handleyomys of family Cricetidae. It is nocturnal and is found in Guatemala and Mexico in montane forest at elevations from 1250 to 3250 m.-Literature cited:*Musser, G. G. and M. D....

            ,
            Handleyomys rhabdops
          • Long-nosed Rice Rat
            Long-Nosed Rice Rat
            Handleyomys rostratus, also known as the Long-nosed Oryzomys, Long-nosed Rice Rat, or Rusty Rice Rat is a species of rodent in the genus Handleyomys of family Cricetidae. It is found in Belize, El Salvador, Guatemala, Honduras, Mexico, and Nicaragua. It is nocturnal and is found in forests at...

            ,
            Handleyomys rostratus
          • Cloud Forest Rice Rat
            Cloud Forest Rice Rat
            Handleyomys saturatior, also known as the Cloud Forest Oryzomys or Cloud Forest Rice Rat, is a species of rodent in the genus Handleyomys of family Cricetidae....

            ,
            Handleyomys saturatior
        • Genus Holochilus
          Holochilus
          Holochilus is a genus of semiaquatic rodents in the tribe Oryzomyini of family Cricetidae, sometimes called marsh rats. It contains three living species, Holochilus brasiliensis, Holochilus chacarius, and Holochilus sciureus, which are widely distributed in South America east of the Andes, and a...

          - Marsh Rats
          • Web-footed Marsh Rat
            Web-footed Marsh Rat
            Holochilus brasiliensis, also known as the Brazilian Marsh Rat or Web-footed Marsh Rat, is a species of semiaquatic rodent from South America. It is found in Argentina, Brazil and Uruguay.-Literature cited:...

            ,
            Holochilus brasiliensis
          • Chaco Marsh Rat
            Chaco Marsh Rat
            Holochilus chacarius, also known as the Chacoan Marsh Rat or Chaco Marsh Rat, is a semiaquatic rodent species in the family Cricetidae. It is found in Argentina and Paraguay within the Gran Chaco.-Literature cited:...

            ,
            Holochilus chacarius
          • Common Marsh Rat, Holochilus sciureus
        • Genus Hylaeamys
          Hylaeamys
          Hylaeamys is a genus of South American oryzomyine rodents found principally in humid forested areas east of the Andes. The species in this genus have historically been placed in Oryzomys. They are most closely related to Euryoryzomys, Transandinomys, Nephelomys, Oecomys, and Handleyomys, and most...

          • Hylaeamys acritus
            Hylaeamys acritus
            Hylaeamys acritus, formerly Oryzomys acritus, is an oryzomyine rodent of the family Cricetidae. It is known only from northeastern Bolivia. It is terrestrial and is found in moist lowland semideciduous forest and savanna.-References:...

          • Hylaeamys laticeps
            Hylaeamys laticeps
            Hylaeamys laticeps, also known as the Atlantic Forest Oryzomys or Large-headed Rice Rat, is a species of rodent in the genus Hylaeamys of family Cricetidae. It occurs in the Atlantic Forest region of southeastern Brazil...

          • Large-headed Rice Rat, Hylaeamys megacephalus
          • Sowbug Rice Rat, Hylaeamys oniscus
          • Hylaeamys perenensis
          • Tate's Rice Rat
            Tate's rice rat
            Hylaeamys tatei, also known as Tate's Oryzomys or Tate's Rice Rat, is a South American rodent species of the family Cricetidae. It is known only from the eastern foothills of the Andes in central Ecuador, where it has been found at elevations from 1130 to 1520 m. It is most closely related to...

            ,
            Hylaeamys tatei
          • Yungas Rice Rat
            Yungas Rice Rat
            Hylaeamys yunganus, also known as the Amazonian Oryzomys or Yungas Rice Rat, is a species of rodent in the genus Hylaeamys of family Cricetidae. It is found in lowland tropical rainforest throughout Amazonia, in northeastern Bolivia, eastern Peru, eastern Ecuador, southeastern Colombia, southern...

            ,
            Hylaeamys yunganus
        • Genus Lundomys - Lund's Amphibious Rat
          • Lund's Amphibious Rat, Lundomys molitor
        • Genus Megalomys
          Megalomys
          Megalomys is a genus of rodent in the family Cricetidae, part of the tribe Oryzomyini. The genus contains four large rodents from various Caribbean islands, all of which are now extinct. The last species to survive was M...

          † - Giant Rice Rats
          • Barbuda giant rice-rat, Megalomys audreyae
          • Megalomys curazensis
            Megalomys curazensis
            Megalomys curazensis is a species of rodent from the Pleistocene of the island of Curaçao, off northwestern Venezuela. It is a member of the genus Megalomys, which also includes species from other islands of the Lesser Antilles. It is known from abundant but fragmentary material found throughout...

          • Antillean Giant Rice Rat
            Antillean Giant Rice Rat
            Megalomys desmarestii, also known as the Martinique Muskrat, Desmarest's Pilorie, or the Antillean Giant Rice Rat, is an extinct rice rat from Martinique in the Caribbean. It was among the largest species of West Indian rice rat, as big as a cat, and was one of the first Caribbean mammals to become...

            ,
            Megalomys desmarestii
          • Santa Lucian Pilorie, Megalomys luciae
        • Genus Melanomys
          Melanomys
          Melanomys is a genus of rodent in the tribe Oryzomyini of family Cricetidae, which is distributed in northern South America and adjacent Central America. It contains three species, two of which—Melanomys robustulus and Melanomys zunigae—have limited distributions...

          - Dark Rice Rats
          • Dusky Rice Rat
            Dusky Rice Rat
            Melanomys caliginosus, also known as the Dusky Melanomys or Dusky Rice Rat, is a species of rodent in the genus Melanomys of family Cricetidae. It is found from Central America, in Honduras, Nicaragua, Costa Rica, and Panama, into South America, where it occurs in Venezuela, Colombia, and Ecuador....

            ,
            Melanomys caliginosus
          • Robust Dark Rice Rat
            Robust Dark Rice Rat
            Melanomys robustulus, also known as the Robust Melanomys or Robust Dark Rice Rat, is a species of rodent in the genus Melanomys of family Cricetidae. It is found on the eastern slope of the Andes in Ecuador.-Literature cited:...

            ,
            Melanomys robustulus
          • Zuniga's Dark Rice Rat
            Zuniga's Dark Rice Rat
            Melanomys zunigae, also known as Zuniga's Melanomys or Zuniga's Dark Rice Rat, is a species of rodent in the genus Melanomys of family Cricetidae. Known only from a small region of coastal Peru, it is listed as "critically endangered" by the IUCN and may even be extinct.-Literature cited:*Musser,...

            ,
            Melanomys zunigae
        • Genus Microakodontomys - Brasilia's Mouse
          • Intermediate Lesser Grass Mouse, Microakodontomys transitorius
        • Genus Microryzomys
          Microryzomys
          Microryzomys is a genus of rodent in the tribe Oryzomyini of family Cricetidae. It is closely related to Oreoryzomys, Oligoryzomys, and Neacomys. It contains two species, both restricted to the Andes: Microryzomys altissimus and Microryzomys minutus.-Literature cited:*Musser, G.G. and Carleton,...

          - Small Rice Rats
          • Highland Small Rice Rat
            Highland Small Rice Rat
            Microryzomys altissimus, also known as the Páramo Colilargo or Highland Small Rice Rat, is a species of rodent in the genus Microryzomys of family Cricetidae. It is found in Colombia, Ecuador, and Peru, but the Colombian segment may be a separate species.-Literature cited:*Gómez-Laverde, M., Rivas,...

            ,
            Microryzomys altissimus
          • Forest Small Rice Rat
            Forest Small Rice Rat
            Microryzomys minutus, also known as the Montane Colilargo or the Forest Small Rice Rat, is a species of rodent in the genus Microryzomys of family Cricetidae. It is found in Bolivia, Colombia, Ecuador, Peru, and Venezuela, but these populations may in fact represent more than one...

            ,
            Microryzomys minutus
        • Genus Mindomys
          • Hammond's Rice Rat
            Hammond's Rice Rat
            Mindomys hammondi, also known as Hammond's Rice Rat or Hammond's Oryzomys, is a species of rodent in the tribe Oryzomyini of family Cricetidae...

            ,
            Mindomys hammondi
        • Genus Neacomys
          Neacomys
          The genus Neacomys, also known as bristly mice because of their spiny fur, includes several species of rodents in the tribe Oryzomyini of family Cricetidae. It is most closely related to Oligoryzomys, Oreoryzomys, and Microryzomys. Neacomys species are mainly found in Amazonia, but N. pictus occurs...

          - Bristly Mice
          • Dubost's Bristly Mouse, Neacomys dubosti
          • Guiana Bristly Mouse
            Guiana Bristly Mouse
            Neacomys guianae, also known as the Guianan Neacomys or Guiana Bristly Mouse, is a nocturnal rodent species from South America. It is found in lowland tropical rainforests in northeastern Brazil, French Guiana, Guyana, Suriname and Venezuela. Its diet consists of insects, seeds and...

            ,
            Neacomys guianae
          • Small Bristly Mouse, Neacomys minutus
          • Musser's Bristly Mouse, Neacomys musseri
          • Paracou Bristly Mouse, Neacomys paracou
          • Painted Bristly Mouse
            Painted Bristly Mouse
            Neacomys pictus, also known as the Painted Neacomys or Painted Bristly Mouse, is a species of rodent in the genus Neacomys of family Cricetidae. It is found only in Panama.-Literature cited:...

            ,
            Neacomys pictus
          • Common Bristly Mouse, Neacomys spinosus
          • Narrow-footed Bristly Mouse
            Narrow-footed Bristly Mouse
            Neacomys tenuipes, also known as the Narrow-footed Neacomys or Narrow-footed Bristly Mouse, is found along the northern Andes from northwestern Venezuela through Colombia into Ecuador, in rainforest at elevations from 400 to 1750 m...

            ,
            Neacomys tenuipes
        • Genus Nectomys
          Nectomys
          Nectomys is a genus of rodent in the tribe Oryzomyini of family Cricetidae. It is closely related to Amphinectomys and was formerly considered congeneric with Sigmodontomys...

          - Water Rats
          • Western Amazonian Nectomys
            Western Amazonian Nectomys
            Nectomys apicalis, also known as the Western Amazonian Nectomys, is a semiaquatic species of rodent in the genus Nectomys of family Cricetidae. It is found east of the Andes in Ecuador, Peru, and Bolivia, east into western Brazil; further to the east, it is replaced by N. rattus...

            ,
            Nectomys apicalis
          • Magdalena Nectomys
            Magdalena Nectomys
            Nectomys magdalenae, also known as the Magdalena Nectomys, is a nocturnal, semiaquatic species of rodent in the genus Nectomys of family Cricetidae. It is found in northwestern Colombia at altitudes from sea level to 2000 m, including near the Magdalena River .-Literature cited:*Delgado, C.,...

            ,
            Nectomys magdalenae
          • Trinidad Water Rat
            Trinidad Water Rat
            Nectomys palmipes, also known as the Trinidad Nectomys or Trinidad Water Rat, is a species of rodent in genus Nectomys of family Cricetidae. It is found on the island of Trinidad and on the nearby mainland of Venezuela.-Literature cited:...

            ,
            Nectomys palmipes
          • Amazonian Nectomys, Nectomys rattus
          • South American Water Rat, Nectomys squamipes
        • Genus Nephelomys
          Nephelomys
          Nephelomys is a genus of South American oryzomyine rodents found in the Andes from Bolivia to Venezuela, with a westward extension into the mountains of Costa Rica...

          • Tomes's Rice Rat
            Tomes's Rice Rat
            Nephelomys albigularis, also known as the White-throated Oryzomys or Tomes's Rice Rat, is a species of rodent in the genus Nephelomys of family Cricetidae. Described in 1860, it was the first Nephelomys species to be discovered...

            ,
            Nephelomys albigularis
          • Ecuadorian Rice Rat, Nephelomys auriventer
          • Caracol Rice Rat, Nephelomys caracolus
          • Nephelomys childi
            Nephelomys childi
            Nephelomys childi is a species of rodent in the genus Nephelomys of family Cricetidae. The type locality is at Bogotá, Colombia, and the type locality of its junior synonym, oconnelli, is at a place known as Buenavista, about southeast of Bogotá. It was named after Mr. George D...

          • Boquete Rice Rat
            Boquete Rice Rat
            Nephelomys devius, also known as the Talamancan Oryzomys, Boquete Rice Rat, Chiriqui Rice Rat, or Montane Rice Rat, is a species of rodent in the genus Nephelomys of family Cricetidae. It is found in cloud forest in the highlands of Costa Rica and western Panama.The upperparts are light brown and...

            ,
            Nephelomys devius
          • Keays's Rice Rat
            Keays's Rice Rat
            Nephelomys keaysi, also known as Keays's Oryzomys or Keays's Rice Rat, is a species of rodent in the genus Nephelomys of family Cricetidae. It is found from southeastern Peru to northern Bolivia on the eastern slope of the Andes in Yungas humid forest at altitudes of 1000 to 2600 m...

            ,
            Nephelomys keaysi
          • Light-footed Rice Rat
            Light-Footed Rice Rat
            Nephelomys levipes, also known as the Nimble-footed Oryzomys or Light-footed Rice Rat, is a species of rodent in the genus Nephelomys of family Cricetidae. It is found on the eastern slope of the Andes from southeastern Peru into west-central Bolivia in cloud forest at elevations from . It occurs...

            ,
            Nephelomys levipes
          • Nephelomys meridensis
          • Nephelomys moerex
            Nephelomys moerex
            Nephelomys moerex is a species of rodent in the genus Nephelomys of family Cricetidae. The type locality is at Mindo in western Ecuador, where it has been recorded together with three other rodents of the oryzomyine group, Sigmodontomys aphrastus, Mindomys hammondi, and Handleyomys alfaroi, as well...

          • Nephelomys nimbosus
            Nephelomys nimbosus
            Nephelomys nimbosus is a species of rodent in the genus Nephelomys of family Cricetidae. Its type locality is at San Antonio on the northeastern slope of the Tungurahua in the Andes of Ecuador, at an altitude of about . The type series included five individuals.The fur of the upperparts is brown to...

          • Nephelomys pectoralis
            Nephelomys pectoralis
            Nephelomys pectoralis is a species of rodent in the genus Nephelomys of family Cricetidae. Its type locality is west of the city of Popayán, Cauca Department, Colombia, at an altitude of . American zoologist Joel Asaph Allen first described it in 1912 on the basis of 112 specimens from several...

          • Mount Pirre Rice Rat, Nephelomys pirrensis
        • Genus Nesoryzomys
          Nesoryzomys
          Nesoryzomys is a genus of rodent in the tribe Oryzomyini of family Cricetidae, endemic to the Galápagos Islands. Other rodents restricted to the Galápagos include Megaoryzomys curioi and Aegialomys galapagoensis.-References:...

          - Galapagos Mice
          • Darwin's Galápagos Mouse, Nesoryzomys darwini
          • Fernandina Rice Rat, Nesoryzomys fernandinae
          • Indefatigable Galápagos Mouse
            Indefatigable Galapagos Mouse
            Nesoryzomys indefessus, also known as the Santa Cruz Nesoryzomys or Indefatigable Galápagos Mouse, is a rodent of the genus Nesoryzomys of family Cricetidae from Galápagos Islands of Ecuador. It contains two subspecies: one formerly lived on Santa Cruz Island, but is now extinct, probably due to...

            ,
            Nesoryzomys indefessus
          • Santiago Galápagos Mouse
            Santiago Galapagos Mouse
            Nesoryzomys swarthi, also known as the Santiago Nesoryzomys or Santiago Galápagos Mouse, is a species of rodent in the genus Nesoryzomys of family Cricetidae....

            ,
            Nesoryzomys swarthi
        • Genus Noronhomys - Vespucci's Rodent †
          • Vespucci's Rodent
            Vespucci's Rodent
            Noronhomys vespuccii, also known as Vespucci's Rodent, is an extinct rat species from the islands of Fernando de Noronha off northeastern Brazil. Italian explorer Amerigo Vespucci may have seen it on a visit to Fernando de Noronha in 1503, but it subsequently became extinct, perhaps because of the...

            ,
            Noronhomys vespuccii
        • Genus Oecomys
          Oecomys
          Oecomys is a genus of rodent within the tribe Oryzomyini of family Cricetidae. It contains about 17 species, which live in trees and are distributed across forested parts of South America, extending into Panama and Trinidad.-Literature cited:...

          - Arboreal Rice Rats
          • North Amazonian Arboreal Rice Rat, Oecomys auyantepui
          • Bicolored Arboreal Rice Rat
            Bicolored Arboreal Rice Rat
            Oecomys bicolor, also known as the White-bellied Oecomys or Bicolored Arboreal Rice Rat, is a species of rodent in the genus Oecomys of family Cricetidae...

            ,
            Oecomys bicolor
          • Atlantic Forest Oecomys
            Atlantic Forest Oecomys
            Oecomys catherinae, also known as the Atlantic Forest Oecomys, is a species of rodent in the genus Oecomys from eastern Brazil, where it lives in a variety of habitats including the Atlantic forest, cerrado and caatinga. It is related to Oecomys trinitatis, but has thicker fur.-Literature...

            ,
            Oecomys catherinae
          • Cleber's Arboreal Rice Rat
            Cleber's Arboreal Rice Rat
            Oecomys cleberi, also known as Cleber's Oecomys or Cleber's Arboreal Rice Rat, is a species of rodent in the genus Oecomys of family Cricetidae. Known only from the Federal District of Brazil, its taxonomic status relative to O. concolor and O. paricola is unresolved.-Literature cited:*Costa, L.,...

            ,
            Oecomys cleberi
          • Unicolored Rice Rat, Oecomys concolor
          • Yellow Arboreal Rice Rat
            Yellow Arboreal Rice Rat
            Oecomys flavicans, also known as the Tawny Oecomys or Yellow Arboreal Rice Rat, is a species of rodent in the genus Oecomys of family Cricetidae. It is found in the mountains of northwestern Venezuela and nearby Colombia.-Literature cited:...

            ,
            Oecomys flavicans
          • Mamore Arboreal Rice Rat
            Mamore Arboreal Rice Rat
            Oecomys mamorae, also known as the Mamore Oecomys or Mamore Arboreal Rice Rat, is an arboreal species of rodent in the genus Oecomys of family Cricetidae. Its distribution extends over much of Bolivia and into nearby Brazil and Paraguay. Although Oecomys has been recorded from Argentina, it is...

            ,
            Oecomys mamorae
          • Brazilian Arboreal Rice Rat
            Brazilian Arboreal Rice Rat
            Oecomys paricola, also known as the Brazilian Oecomys, Brazilian Arboreal Rice Rat, or South Amazonian Arboreal Rice Rat, is a species of rodent in the genus Oecomys of family Cricetidae. It is found in central Brazil south of the Amazon, where it lives in lowland tropical rainforest.-Literature...

            ,
            Oecomys paricola
          • Dusky Arboreal Rice Rat
            Dusky Arboreal Rice Rat
            Oecomys phaeotis, also known as the Dusky Arboreal Rice Rat or Dusky Oecomys, is a species of rodent in the genus Oecomys of family Cricetidae. It is found on the eastern slopes of the Andes of Peru, at 1500 to 2000 m altitude....

            ,
            Oecomys phaeotis
          • King Arboreal Rice Rat
            King Arboreal Rice Rat
            Oecomys rex, also known as the Regal Oecomys or King Arboreal Rice Rat, is a species of rodent in the genus Oecomys of family Cricetidae. It is found in Guyana, Suriname, French Guiana, and nearby parts of Venezuela and Brazil....

            ,
            Oecomys rex
          • Robert's Arboreal Rice Rat
            Robert's Arboreal Rice Rat
            Oecomys roberti, also known as Robert's Oecomys or Robert's Arboreal Rice Rat, is a rodent species from South America in the genus Oecomys. It has a broad distribution in Amazonia, being found in Bolivia, Brazil, French Guiana, Guyana, Peru, Suriname and Venezuela.-Literature cited:*Costa, L.,...

            ,
            Oecomys roberti
          • Red Arboreal Rice Rat
            Red Arboreal Rice Rat
            Oecomys rutilus, also known as the Reddish Oecomys or Red Arboreal Rice Rat, is a species of rodent in the genus Oecomys of family Cricetidae. It is found in Guyana, Suriname, French Guiana, and nearby regions of Brazil and Venezuela....

            ,
            Oecomys rutilus
          • Arboreal Rice Rat
            Arboreal Rice Rat
            Oecomys auyantepui, also known as the Guianan Oecomys and North Amazonian Arboreal Rice Rat, is a species of rodent in the genus Oecomys from South America. It is found in Guyana, Suriname, French Guiana, and nearby regions of Venezuela and Brazil.-Literature cited:*Duff, A. and Lawson, A. 2004....

            ,
            Oecomys speciosus
          • Foothill Arboreal Rice Rat
            Foothill Arboreal Rice Rat
            Oecomys superans, also known as the Large Oecomys or Foothill Arboreal Rice Rat, is a species of rodent in the genus Oecomys of family Cricetidae. It is found along the eastern slope of the Andes in southern Colombia, Ecuador, and Peru and east into Amazonia, including parts of Brazil...

            ,
            Oecomys superans
          • Oecomys sydandersoni
            Oecomys sydandersoni
            Oecomys sydandersoni is an arboreal species of rodent in the genus Oecomys. It lives in forest patches in a small area in eastern Bolivia. It is a medium-sized species, weighing about 45 g , with mostly grayish and brownish fur and short and broad hindfeet with well-developed pads.First...

          • Long-furred Rice Rat, Oecomys trinitatis
        • Genus Oligoryzomys
          Oligoryzomys
          Oligoryzomys is a genus of rodents in the tribe Oryzomyini of family Cricetidae. Many species are known as pygmy rice rats or colilargos...

          - Pygmy Rice Rats
          • Andean Pygmy Rice Rat
            Andean Pygmy Rice Rat
            Oligoryzomys andinus, also known as the Andean Colilargo or Andean Pygmy Rice Rat, is a species of rodent in genus Oligoryzomys of family Cricetidae. It is found in the Andes of southern Peru and western Bolivia, but may in fact include more than one species.-Literature cited:*Musser, G.G. and...

            ,
            Oligoryzomys andinus
          • Sandy Pygmy Rice Rat
            Sandy Pygmy Rice Rat
            Oligoryzomys arenalis, also known as the Sandy Colilargo or Sandy Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in the Andes of Peru at 400 to 2850 m altitude, but may include more than one species.-Literature cited:*Musser, G.G. and Carleton,...

            ,
            Oligoryzomys arenalis
          • Brenda's Colilargo
            Brenda's Colilargo
            Oligoryzomys brendae, also known as Brenda's Colilargo, is a South American species of rodent in the genus Oligoryzomys. It is found only in Tucumán Province in northwestern Argentina, but its taxonomic status requires revision....

            ,
            Oligoryzomys brendae
          • Chacoan Pygmy Rice Rat
            Chacoan Pygmy Rice Rat
            Oligoryzomys chacoensis, also known as the Chacoan Colilargo or Chacoan Pygmy Rice Rat, is a rodent species from South America. It is found in the Gran Chaco region of southeastern Bolivia, southwestern Brazil, Paraguay, and northeastern Argentina.It is one of the hosts of the Hantavirus serotype...

            ,
            Oligoryzomys chacoensis
          • Destructive Pygmy Rice Rat
            Destructive Pygmy Rice Rat
            Oligoryzomys destructor, also known as Tschudi's Colilargo or the Destructive Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae...

            ,
            Oligoryzomys destructor
          • Yellow Pygmy Rice Rat
            Yellow Pygmy Rice Rat
            Oligoryzomys flavescens, also known as the Flavescent Colilargo or Yellow Pygmy Rice Rat is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in southern South America, occurring in southern Brazil, Paraguay, Uruguay, and northeastern Argentina.-Literature...

            ,
            Oligoryzomys flavescens
          • Fornes' Colilargo
            Fornes' Colilargo
            Oligoryzomys fornesi, also known as Fornes' Colilargo, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found from northeastern Brazil via Paraguay into northeastern Argentina.-Literature cited:...

            ,
            Oligoryzomys fornesi
          • Fulvous Pygmy Rice Rat
            Fulvous Pygmy Rice Rat
            Oligoryzomys fulvescens, also known as the Fulvous Colilargo, Fulvous Pygmy Rice Rat, or Northern Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae...

            ,
            Oligoryzomys fulvescens
          • Grayish Pygmy Rice Rat
            Grayish Pygmy Rice Rat
            Oligoryzomys griseolus, also known as the Grizzled Colilargo or the Grayish Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in the Andes of Venezuela and nearby Colombia.-Literature cited:...

            ,
            Oligoryzomys griseolus
          • Long-tailed Pygmy Rice Rat
            Long-Tailed Pygmy Rice Rat
            Oligoryzomys longicaudatus, also known as the Long-tailed Colilargo or Long-tailed Pygmy Rice Rat, is a species of rodent in the genus Oryzomys of family Cricetidae. It is found in the southern Andes of Chile and Argentina, with an outlying population in eastern Argentina.-Literature cited:*Musser,...

            ,
            Oligoryzomys longicaudatus
          • Magellanic Pygmy Rice Rat
            Magellanic Pygmy Rice Rat
            Oligoryzomys magellanicus, also known as the Patagonian Colilargo and the Magellanic Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in southernmost Argentina and Chile, including Tierra del Fuego.-Literature cited:*Musser, G.G. and Carleton, M.D....

            ,
            Oligoryzomys magellanicus
          • Small-eared Pygmy Rice Rat
            Small-eared Pygmy Rice Rat
            Oligoryzomys microtis, also known as the Small-eared Colilargo or Small-eared Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found in western Brazil, eastern Peru, Bolivia, and northern Paraguay....

            ,
            Oligoryzomys microtis
          • Oligoryzomys moojeni
          • Black-footed Pygmy Rice Rat
            Black-footed Pygmy Rice Rat
            Oligoryzomys nigripes, also known as the Black-footed Colilargo or the Black-footed Pygmy Rice Rat, is a rodent in the genus Oligoryzomys of family Cricetidae. It is found from Pernambuco in northeastern Brazil through the Atlantic Forest and Cerrado into Paraguay, Uruguay, and Argentina, where it...

            ,
            Oligoryzomys nigripes
          • Oligoryzomys rupestris
          • Straw-colored Pygmy Rice Rat
            Straw-colored Pygmy Rice Rat
            Oligoryzomys stramineus, also known as the Straw-colored Colilargo or Straw-colored Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It occurs only in the cerrado and caatinga of northeastern Brazil....

            ,
            Oligoryzomys stramineus
          • Sprightly Pygmy Rice Rat
            Sprightly Pygmy Rice Rat
            Oligoryzomys vegetus, also known as the Sprightly Colilargo or Sprightly Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of family Cricetidae. It is found only in the mountains of Costa Rica and western Panama....

            ,
            Oligoryzomys vegetus
          • St. Vincent Pygmy Rice Rat
            St. Vincent Pygmy Rice Rat
            Oligoryzomys victus, also known as the St. Vincent Colilargo or St. Vincent Pygmy Rice Rat, is a species of rodent in the genus Oligoryzomys of the oryzomyine tribe. Only one specimen is known, which was collected on Saint Vincent in the Lesser Antilles in about 1892, and it is now presumed...

            ,
            Oligoryzomys victus
        • Genus Oryzomys
          Oryzomys
          Oryzomys is a genus of semiaquatic rodents in the tribe Oryzomyini living in southern North America and far northern South America. It includes eight species, two of which—the marsh rice rat of the United States and O. couesi of Mexico and Central America—are widespread; the six others have...

          - Rice Rats
          • Oryzomys albiventer
            Oryzomys albiventer
            Oryzomys albiventer is a rodent in the genus Oryzomys of family Cricetidae from interior western Mexico, in the states of Jalisco, Guanajuato, and Michoacán. First described in 1901 as a separate species, it was later lumped under O. couesi and the marsh rice rat until it was reinstated as a...

          • Jamaican Rice Rat
            Jamaican Rice Rat
            Oryzomys antillarum, also known as the Jamaican rice rat, is an extinct rodent of Jamaica. A member of the genus Oryzomys within the family Cricetidae, it is similar to O. couesi of mainland Central America, from where it may have dispersed to its island during the last glacial period...

            ,
            Oryzomys antillarum
          • Coues' Rice Rat
            Coues' Rice Rat
            Oryzomys couesi, also known as Coues' Rice Rat, is a semiaquatic rodent in the family Cricetidae occurring from southernmost Texas through Mexico and Central America into northwestern Colombia. It is usually found in wet habitats, such as marshes, but also lives in drier forests and shrublands...

            ,
            Oryzomys couesi
          • Thomas's Rice Rat, Oryzomys dimidiatus
          • Gorgas's Rice Rat
            Gorgas's Rice Rat
            Oryzomys gorgasi, also known as Gorgas's Oryzomys or Gorgas's Rice Rat, is a rodent in the genus Oryzomys of family Cricetidae. First collected as a living animal in 1967, it is known from only a few localities, including a freshwater swamp in the lowlands of northwestern Colombia and a mangrove...

            ,
            Oryzomys gorgasi
          • Oryzomys nelsoni
          • Marsh Rice Rat
            Marsh Rice Rat
            The marsh rice rat is a semiaquatic North American rodent in the family Cricetidae. It is found mostly in the eastern and southern United States, from New Jersey and Kansas south to Florida and northeasternmost Tamaulipas, Mexico; its range previously extended further west and north, where it may...

            ,
            Oryzomys palustris
          • Lower California Rice Rat, Oryzomys peninsulae ?†
        • Genus Pseudoryzomys - False Rice Rats
          • Brazilian False Rice Rat
            Brazilian False Rice Rat
            Pseudoryzomys simplex, also known as the Brazilian False Rice Rat or False Oryzomys, is a species of rodent in the family Cricetidae from south-central South America. It is found in lowland palm savanna and thorn scrub habitats...

            , Pseudoryzomys simplex
        • Genus Scolomys
          Scolomys
          Scolomys is a genus of rodent in the tribe Oryzomyini of family Cricetidae. Some evidence suggests that it is related to Zygodontomys. It is characterized, among other traits, by spiny fur. It contains two species, Scolomys melanops and Scolomys ucayalensis.-Literature cited:*Musser, G.G. and...

          - New World Spiny Mice
          • South American Spiny Mouse
            South American Spiny Mouse
            Scolomys melanops, also known as the Short-nosed Scolomys, South American Spiny Mouse, or Ecuadorian Spiny Mouse, is a species of rodent in the genus Scolomys of family Cricetidae. It is found only in Ecuador.-Literature cited:...

            , Scolomys melanops
          • Ucayali Spiny Mouse
            Ucayali Spiny Mouse
            Scolomys ucayalensis, also known as the Long-nosed Scolomys or Ucayali Spiny Mouse is a nocturnal rodent species from South America. It is part of the genus Scolomys within the tribe Oryzomyini. It is found in Brazil, Colombia, Ecuador and Peru, at elevations from in the Amazon...

            , Scolomys ucayalensis
        • Genus Sigmodontomys
          Sigmodontomys
          Sigmodontomys is a genus of rodent in the tribe Oryzomyini of family Cricetidae. It is related to Nectomys and Melanomys and was previously included in Nectomys. It includes two species, Sigmodontomys alfari and the much rarer Sigmodontomys aphrastus, but whether these are indeed each other's...

          - Rice Water Rats
          • Alfaro's Rice Water Rat
            Alfaro's Rice Water Rat
            Sigmodontomys alfari, also known as the Short-tailed Sigmodontomys, Alfaro's Rice Water Rat, Cana Rice Rat, or Allen's Rice Rat, is a species of rodent in the genus Sigmodontomys of family Cricetidae...

            , Sigmodontomys alfari
          • Harris's Rice Water Rat
            Harris's Rice Water Rat
            Sigmodontomys aphrastus, also known as the Long-tailed Sigmodontomys, Harris's Rice Water Rat, or Long-tailed Rice Rat, is a species of rodent in genus Sigmodontomys of family Cricetidae. It is known from Costa Rica, Panama, and Ecuador.-Literature cited:*Duff, A. and Lawson, A. 2004. Mammals of...

            , Sigmodontomys aphrastus
        • Genus Sooretamys
          • Rat-headed Rice Rat, Sooretamys angouya
        • Genus Transandinomys
          Transandinomys
          Transandinomys is a genus of rodents in the tribe Oryzomyini of family Cricetidae. It includes two species—T. bolivaris and T. talamancae—found in forests from Honduras in Central America south and east to southwestern Ecuador and northwestern Venezuela in northern South America...

          • Long-whiskered Rice Rat, Transandinomys bolivaris
          • Transandinomys talamancae
        • Genus Zygodontomys
          Zygodontomys
          Zygodontomys is a genus of rodent in the tribe Oryzomyini of the family Cricetidae. Its closest relative may be Scolomys. It ranges from Central America east to the Guianas. It contains two species: Zygodontomys brunneus and Zygodontomys brevicauda....

          - Cane Mice
          • Short-tailed Cane Mouse, Zygodontomys brevicauda
          • Colombian Cane Mouse, Zygodontomys brunneus
      • Tribe Thomasomyini
        • Genus Abrawayaomys - Ruschi's Rat
          • Ruschi's Rat
            Ruschi's Rat
            Ruschi's Rat , Abrawayaomys ruschii, is a rodent species found in Argentina and Brazil. Some cranial features suggest it may be an archaic relative of the Thomas's Parmo mouse . The upper parts are greyish yellow with a darker head and yellowish-white underparts...

            , Abrawayaomys ruschii
        • Genus Aepeomys
          Aepeomys
          Aepeomys is a genus of rodent in the family Cricetidae.It contains the following species:* Olive Montane Mouse * Reig's Montane Mouse...

          - Montane Mice
          • Olive Montane Mouse
            Olive Montane Mouse
            The Olive Montane Mouse is a species of rodent in the family Cricetidae.It is found in Ecuador and Venezuela....

            , Aepeomys lugens
          • Reig's Montane Mouse
            Reig's Montane Mouse
            Reig's Montane Mouse is a species of rodent in the family Cricetidae.It is found only in Venezuela. It is named after Argentine biologist Osvaldo Reig ....

            , Aepeomys reigi
        • Genus Chilomys - Columbian Forest Mouse
          • Colombian Forest Mouse
            Colombian Forest Mouse
            The Colombian Forest Mouse is a species of rodent in the family Cricetidae. It is the only species in the genus Chilomys.It is found in Colombia, Ecuador, and Venezuela.-References:...

            , Chilomys instans
        • Genus Delomys
          Delomys
          Delomys is a genus of South American rodents in the tribe Thomasomyini of family Cricetidae. Three species are known, all found in Argentina and Brazil. They are as follows:* Montane Atlantic Forest Rat...

          - Atlantic Forest Rats
          • Montane Atlantic Forest Rat
            Montane Atlantic Forest rat
            The montane Atlantic Forest rat is a rodent species from South America. It is endemic to part of the Atlantic Forest region of southeastern Brazil, where it is found at elevations from 1000 to 2700 m....

            , Delomys collinus
          • Striped Atlantic Forest Rat
            Striped Atlantic Forest Rat
            The Striped Atlantic Forest Rat, Delomys dorsalis, is a rodent species from South America. It is found in Argentina and Brazil....

            , Delomys dorsalis
          • Pallid Atlantic Forest Rat
            Pallid Atlantic Forest Rat
            The Pallid Atlantic Forest Rat, Delomys sublineatus, is a rodent species from South America. It is found in Brazil....

            , Delomys sublineatus
        • Genus Phaenomys - Rio de Janeiro Arboreal Rat
          • Rio de Janeiro Arboreal Rat
            Rio de Janeiro Arboreal Rat
            The Rio de Janeiro Arboreal Rat, Phaenomys ferrugineus, is a rodent species from South America. It is found in Brazil. It is the only species in the genus Phaenomys....

            , Phaenomys ferrugineus
        • Genus Rhagomys
          Rhagomys
          Rhagomys is a genus of South American rodents in the tribe Thomasomyini of family Cricetidae. Two species are known, found in Bolivia, southeast Peru and the Atlantic Forest of southeast Brazil. They are as follows:...

          - Arboreal Mice
          • Long-tongued Arboreal Mouse
            Long-tongued arboreal mouse
            The long-tongued arboreal mouse, Rhagomys longilingua, is a rodent species from South America. It is found in a variety of habitats in Bolivia and Peru at elevations from 450 to 2100 m. The species is at least partly arboreal....

            , Rhagomys longilingua
          • Brazilian Arboreal Mouse
            Brazilian Arboreal Mouse
            The Brazilian Arboreal Mouse, Rhagomys rufescens, is a rodent species from South America. It is found in the Atlantic Forest of southeast Brazil....

            , Rhagomys rufescens
        • Genus Rhipidomys
          Rhipidomys
          Rhipidomys is a genus of rodents in the family Cricetidae, comprising at least 18 species of climbing mouse:* Southern Climbing Mouse * Cariri Climbing Mouse...

          - Climbing Mice
          • Southern Climbing Mouse
            Southern Climbing Mouse
            The Southern Climbing Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Bolivia.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Rhipidomys austrinus
          • Cariri Climbing Mouse
            Cariri climbing mouse
            The Cariri climbing mouse, Rhipidomys cariri, is a partly arboreal rodent species from South America. It is known from two mesic localities in Ceara, northeastern Brazil, within the semiarid caatinga ecoregion. It has been found in areas under cultivation. Cariri is the name of an administrative...

            , Rhipidomys cariri
          • Cauca Climbing Mouse
            Cauca Climbing Mouse
            The Cauca Climbing Mouse is a species of arboreal rodent in the family Cricetidae. It is endemic to Colombia, where it is found in montane forest at elevations from 2200 to 3500 m.-References:...

            , Rhipidomys caucensis
          • Coues's Climbing Mouse
            Coues's Climbing Mouse
            Coues's Climbing Mouse is a species of rodent in the family Cricetidae.It is found in Colombia, Ecuador, Peru, Trinidad and Tobago, and Venezuela. It is named after American zoologist Elliott Coues.-References:...

            , Rhipidomys couesi
          • Eastern Amazon Climbing Mouse
            Eastern Amazon climbing mouse
            The eastern Amazon climbing mouse, Rhipidomys emiliae, is a rodent species from South America. It is endemic to central Brazil, where it is found in the eastern fringe of the Amazon Rainforest, as well as in gallery forest and tropical dry forest within the cerrado ecoregion. It is often found in...

            , Rhipidomys emiliae
          • Buff-bellied Climbing Mouse
            Buff-Bellied Climbing Mouse
            The Buff-bellied Climbing Mouse is a species of rodent in the family Cricetidae.It is found in Colombia and Venezuela.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Rhipidomys fulviventer
          • Gardner's Climbing Mouse
            Gardner's Climbing Mouse
            Gardner's Climbing Mouse, Rhipidomys gardneri, is a rodent species from South America. It is found in Brazil and Peru....

            , Rhipidomys gardneri
          • Broad-footed Climbing Mouse
            Broad-Footed Climbing Mouse
            The Broad-footed Climbing Mouse is a species of rodent in the family Cricetidae. It is found in Colombia, Ecuador, Panama and Peru....

            , Rhipidomys latimanus
          • White-footed Climbing Mouse
            White-footed Climbing Mouse
            The White-footed Climbing Mouse, Rhipidomys leucodactylus, is a South American rodent species found in Bolivia, Brazil, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela....

            , Rhipidomys leucodactylus
          • MacConnell's Climbing Mouse
            MacConnell's Climbing Mouse
            MacConnell's Climbing Mouse, Rhipidomys macconnelli, is a nocturnal and arboreal rodent species from South America. It is found in Brazil, Guyana and Venezuela, where it inhabits rainforest at elevations from 300 to 2800 m....

            , Rhipidomys macconnelli
          • Cerrado Climbing Mouse
            Cerrado climbing mouse
            The cerrado climbing mouse is an arboreal rodent species in the family Cricetidae from South America. It is found in central and eastern Brazil in forests of the cerrado and caatinga, and has also been seen in the Atlantic Forest. Its karyotype is 2n = 44, FN = 48-52.It is sometimes commonly known...

            , Rhipidomys macrurus
          • Atlantic Forest Climbing Mouse
            Atlantic Forest climbing mouse
            The Atlantic Forest climbing mouse is an arboreal rodent species in the family Cricetidae from South America. It is found in the Atlantic Forest of southeastern Brazil at elevations from sea level to 1500 m. Its karyotype is 2n = 44, FN = 74-80.It is sometimes also referred to as the long-tailed...

            , Rhipidomys mastacalis
          • Peruvian Climbing Mouse
            Peruvian climbing mouse
            The Peruvian climbing mouse, Rhipidomys modicus, is a rodent species from South America. It is endemic to the eastern slopes of the Andes in central Peru, where it is found at altitudes from 700 to 1800 m. The species is nocturnal and arboreal, and lives in lower montane forest and cloud forest. It...

            , Rhipidomys modicus
          • Splendid Climbing Mouse
            Splendid Climbing Mouse
            The Splendid Climbing Mouse, Rhipidomys nitela, is a rodent species from South America. It is found in Brazil, French Guyana, Guyana, Suriname and Venezuela....

            , Rhipidomys nitela
          • Yellow-bellied Climbing Mouse
            Yellow-Bellied Climbing Mouse
            The Yellow-bellied Climbing Mouse is a species of arboreal rodent in the family Cricetidae. It is known only from southeastern Peru, where it has been found in cloud forest at an elevation of 1830 m. This species was long known only by the type collection until it was rediscovered in May...

            , Rhipidomys ochrogaster
          • Venezuelan Climbing Mouse
            Venezuelan Climbing Mouse
            The Venezuelan Climbing Mouse is a species of rodent in the family Cricetidae.It is found in Colombia and Venezuela....

            , Rhipidomys venezuelae
          • Charming Climbing Mouse
            Charming Climbing Mouse
            The Charming Climbing Mouse is a species of nocturnal rodent in the family Cricetidae.It is found only in Venezuela....

            , Rhipidomys venustus
          • Wetzel's Climbing Mouse
            Wetzel's Climbing Mouse
            Wetzel's Climbing Mouse is a species of rodent in the family Cricetidae.It is found only in Venezuela.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Rhipidomys wetzeli
        • Genus Thomasomys
          Thomasomys
          Thomasomys is a genus of rodent in the family Cricetidae, named after British zoologist Oldfield Thomas. It contains the following species:* Anderson's Oldfield Mouse * Apeco Oldfield Mouse...

          - Oldfield Mice
          • Anderson's Oldfield Mouse, Thomasomys andersoni
          • Apeco Oldfield Mouse
            Apeco oldfield mouse
            The Apeco oldfield mouse is a species of rodent in the family Cricetidae. It is known only from a single locality in north central Peru, which includes Rio Abiseo National Park, where it was found in cloud forest at an elevation of 3300 m. The species name comes from the acronym for the . It is...

            , Thomasomys apeco
          • Golden Oldfield Mouse
            Golden Oldfield Mouse
            The Golden Oldfield Mouse is a species of rodent in the family Cricetidae.It is found in Colombia, Ecuador, Peru, and Venezuela.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys aureus
          • Beady-eyed Mouse
            Beady-eyed Mouse
            The Beady-eyed Mouse is a species of rodent in the family Cricetidae.It is found only in Ecuador.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Thomasomys baeops
          • Silky Oldfield Mouse
            Silky Oldfield Mouse
            The Silky Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Colombia.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys bombycinus
          • White-tipped Oldfield Mouse
            White-tipped oldfield mouse
            The white-tipped oldfield mouse is a species of rodent in the family Cricetidae. It is found in the Andes from central Ecuador to northern Peru, at elevations from 2500 to 3350 m, where it lives in montane forest....

            , Thomasomys caudivarius
          • Ashy-bellied Oldfield Mouse
            Ashy-bellied Oldfield Mouse
            The Ashy-bellied Oldfield Mouse is a species of rodent in the family Cricetidae.It is found in Colombia and Ecuador.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Thomasomys cinereiventer
          • Ash-colored Oldfield Mouse
            Ash-colored Oldfield Mouse
            The Ash-colored Oldfield Mouse is a species of rodent in the family Cricetidae.It is found in Ecuador and Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Thomasomys cinereus
          • Cinnamon-colored Oldfield Mouse
            Cinnamon-colored oldfield mouse
            The cinnamon-colored oldfield mouse , also called the "cinnamon-colored Thomasomys", is a species of rodent in the family Cricetidae. It is present in the Cordillera Oriental of the Andes from north central Ecuador to southern Colombia, at elevations from 2400 to 3800 m. It has terrestrial habits,...

            , Thomasomys cinnameus
          • Daphne's Oldfield Mouse
            Daphne's Oldfield Mouse
            Daphne's Oldfield Mouse is a species of rodent in the family Cricetidae.It is found in Bolivia and Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys daphne
          • Peruvian Oldfield Mouse
            Peruvian Oldfield Mouse
            The Peruvian Oldfield Mouse is a species of rodent in the family Cricetidae. It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys eleusis
          • Wandering Oldfield Mouse
            Wandering oldfield mouse
            The wandering oldfield mouse , also called the "wandering Thomasomys", is a species of rodent in the family Cricetidae. It has been found in both the Cordillera Oriental and Cordillera Occidental of the Andes in central and north central Ecuador, at elevations from 2400 to 3600 m...

            , Thomasomys erro
          • Slender Oldfield Mouse
            Slender Oldfield Mouse
            The Slender Oldfield Mouse is a species of rodent in the family Cricetidae. It is found in Ecuador and Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys gracilis
          • Hudson's Oldfield Mouse
            Hudson's oldfield mouse
            Hudson's oldfield mouse is a species of rodent in the family Cricetidae. It is known only from the Andes in southern Ecuador, where is has been found at an elevation of 3100 m. It was formerly considered a subspecies of T. gracilis. It is named after American zoologist Wilfred Hudson Osgood....

            , Thomasomys hudsoni
          • Woodland Oldfield Mouse
            Woodland Oldfield Mouse
            The Woodland Oldfield Mouse is a species of rodent in the family Cricetidae.It is found in Colombia and Venezuela.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys hylophilus
          • Inca Oldfield Mouse
            Inca Oldfield Mouse
            The Inca Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys incanus
          • Strong-tailed Oldfield Mouse
            Strong-tailed Oldfield Mouse
            The Strong-tailed Oldfield Mouse is a species of rodent in the family Cricetidae. It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Thomasomys ischyrus
          • Kalinowski's Oldfield Mouse
            Kalinowski's Oldfield Mouse
            Kalinowski's Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys kalinowskii
          • Ladew's Oldfield Mouse
            Ladew's Oldfield Mouse
            Ladew's Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Bolivia.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys ladewi
          • Soft-furred Oldfield Mouse
            Soft-furred Oldfield Mouse
            The Soft-furred Oldfield Mouse is a species of rodent in the family Cricetidae.It is found in Colombia and Venezuela.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys laniger
          • Large-eared Oldfield Mouse
            Large-eared oldfield mouse
            The large-eared oldfield mouse is a species of rodent in the family Cricetidae. It is known only from a single locality in the Andes in north central Peru , in montane forest at an elevation of 3300 m. It has terrestrial habits and is sympatric with T. apeco....

            , Thomasomys macrotis
          • Unicolored Oldfield Mouse
            Unicolored Oldfield Mouse
            The Unicolored Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Colombia.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys monochromos
          • Snow-footed Oldfield Mouse
            Snow-footed Oldfield Mouse
            The Snow-footed Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Colombia.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Thomasomys niveipes
          • Distinguished Oldfield Mouse
            Distinguished Oldfield Mouse
            The Distinguished Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys notatus
          • Ashaninka Oldfield Mouse
            Ashaninka oldfield mouse
            The Ashaninka oldfield mouse is a species of rodent in the family Cricetidae. It is known only from a single locality in the Cordillera Oriental of the southern Peruvian Andes, in montane forest at an elevation of 3350 m. It has terrestrial habits...

            , Thomasomys onkiro
          • Montane Oldfield Mouse
            Montane Oldfield Mouse
            The Montane Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Bolivia.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys oreas
          • Paramo Oldfield Mouse
            Paramo Oldfield Mouse
            The Paramo Oldfield Mouse is a species of rodent in the family Cricetidae. A youth or baby of a Paramo Oldfield mouse is called a 'pinkie', 'kitten' or 'pup'. The females are called 'does' and males 'bucks'...

            , Thomasomys paramorum
          • Popayán Oldfield Mouse
            Popayán oldfield mouse
            The Popayán oldfield mouse , also called the "Popayán Thomasomys", is a species of rodent in the family Cricetidae. It is present in the Andes of southwestern and central western Colombia, at elevations from 1800 to 3200 m. It has been found in páramo, montane forest, and secondary forest. It was...

            , Thomasomys popayanus
          • Cajamarca Oldfield Mouse
            Cajamarca oldfield mouse
            The Cajamarca oldfield mouse is a species of rodent in the family Cricetidae. It is present in the Andes of northwestern Peru, where its habitats include shrubby páramo, montane forest, and secondary forest. The rodent is nocturnal and may be partly arboreal. It was formerly considered a...

            , Thomasomys praetor
          • Thomas's Oldfield Mouse
            Thomas's Oldfield Mouse
            Thomas's Oldfield Mouse is a species of rodent in the family Cricetidae.It is found in Ecuador and Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys pyrrhonotus
          • Rhoads's Oldfield Mouse
            Rhoads's Oldfield Mouse
            Rhoads's Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Ecuador.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys rhoadsi
          • Rosalinda's Oldfield Mouse
            Rosalinda's Oldfield Mouse
            Rosalinda's Oldfield Mouse is a species of rodent in the family Cricetidae. It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys rosalinda
          • Forest Oldfield Mouse
            Forest Oldfield Mouse
            The Forest Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Ecuador.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys silvestris
          • Taczanowski's Oldfield Mouse
            Taczanowski's Oldfield Mouse
            Taczanowski's Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys taczanowskii
          • Ucucha Oldfield Mouse
            Ucucha oldfield mouse
            Thomasomys ucucha, also known as the Ucucha Thomasomys, is a rodent in the genus Thomasomys of the family Cricetidae. Found only in the Cordillera Oriental of Ecuador, a mountain range, it lives in forests and grasslands at 3380 to 3720 m above sea level. It may occur with seven other species...

            , Thomasomys ucucha
          • Dressy Oldfield Mouse
            Dressy Oldfield Mouse
            The Dressy Oldfield Mouse is a species of rodent in the family Cricetidae.It is found only in Venezuela.-References:* Baillie, J. 1996. . Downloaded on 20 July 2007....

            , Thomasomys vestitus
          • Pichincha Oldfield Mouse
            Pichincha oldfield mouse
            The Pichincha oldfield mouse is a species of rodent in the family Cricetidae. It is present in the Cordillera Occidental of the Andes of Ecuador, where its habitats include shrubby páramo and montane forest. It is nocturnal and terrestrial...

            , Thomasomys vulcani
        • Genus Wilfredomys - Wilfred's Mice
          • Greater Wilfred's Mouse
            Greater Wilfred's Mouse
            The Greater Wilfred's Mouse, Wilfredomys oenax, is a rodent species from South America. It is found in southern Brazil and Uruguay in subtropical lowland forest. It is arboreal to some degree. It is the only species in the genus Wilfredomys....

            , Wilfredomys oenax
      • Tribe Wiedomyini
        • Genus Cholomys
          • Cholomys pearsoni
        • Genus Wiedomys
          Wiedomys
          Wiedomys is a genus of South American rodents in the family Cricetidae.It contains the following species:* Cerrado Red-nosed Mouse * Red-nosed Mouse...

          - Red-nosed Mouse
          • Cerrado Red-nosed Mouse
            Cerrado red-nosed mouse
            The cerrado red-nosed mouse, Wiedomys cerradensis, is a rodent species from South America. It is known from one locality in Bahia, eastern Brazil. The species was found in semi-deciduous forest in the cerrado ecoregion....

            , Wiedomys cerradensis
          • Red-nosed Mouse
            Red-nosed Mouse
            The Red-nosed Mouse, Wiedomys pyrrhorhinos, is an arboreal rodent species from South America. It is found in caatinga and cerrado habitat in eastern Brazil....

            , Wiedomys pyrrhorhinos
      • Tribe Abrotrichini
        Abrotrichini
        Abrotrichini, also known as the Andean clade or southern Andean clade, is a tribe of rodents in the subfamily Sigmodontinae. It includes about fifteen species in five genera, distributed in South America from southern Peru to southernmost South America, including the Patagonian steppes...

        • Genus Abrothrix
          Abrothrix
          Abrothrix is a genus of rodent in the tribe Abrotrichini of family Cricetidae.It contains the following living species:*Abrothrix andinus*Abrothrix hershkovitzi*Abrothrix illuteus*Abrothrix jelskii*Abrothrix lanosus...

          • Andean Altiplano Mouse
            Andean Altiplano Mouse
            Abrothrix andinus, also known as the Andean Altiplano Mouse or Andean Akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found in the altiplano habitat of the Andes from central Peru through Bolivia south to Argentina and Chile.-Literature cited:*Musser, G.G. and...

            , Abrothrix andinus
          • Hershkovitz's Grass Mouse
            Hershkovitz's Grass Mouse
            Abrothrix hershkovitzi, also known as Hershkovitz's Grass Mouse or Hershkovitz's Akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found only on some remote islands in southern Chile. It is named after American zoologist Philip Hershkovitz.-Literature...

            , Abrothrix hershkovitzi
          • Gray Grass Mouse
            Gray Grass Mouse
            Abrothrix illuteus, also known as the Gray Akodont or Gray Grass Mouse, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found only in northwestern Argentina.-Literature cited:...

            , Abrothrix illuteus
          • Jelski's Altiplano Mouse
            Jelski's Altiplano Mouse
            Abrothrix jelskii, also known as Jelski's Altiplano Mouse, Jelski's Grass Mouse, or the Ornate Akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found in the altiplano habitat of the Andes from central Peru through Bolivia into northwestern Argentina. Populations...

            , Abrothrix jelskii
          • Woolly Grass Mouse
            Woolly Grass Mouse
            Abrothrix lanosus, also known as the Woolly Grass Mouse or Woolly Akodont, is a species of rodent in the family Cricetidae.It is found in southern Argentina and Chile. It was previously classified in the genus Akodon rather than Abrothrix.-Literature cited:*Musser, G.G. and Carleton, M.D. 2005....

            , Abrothrix lanosus
          • Long-haired Grass Mouse
            Long-haired Grass Mouse
            Abrothrix longipilis, also known as the Long-haired Grass Mouse or Long-haired Akodont, is a species of rodent in the family Cricetidae....

            , Abrothrix longipilis
          • Olive Grass Mouse
            Olive Grass Mouse
            Abrothrix olivaceus, also known as the Olive Grass Mouse or Olive Akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found from northern Chile into southern Chile and Argentina, including the island of Tierra del Fuego. It has had a complex history in both of the...

            , Abrothrix olivaceus
          • Sanborn's Grass Mouse
            Sanborn's Grass Mouse
            Abrothrix sanborni, also known as Sanborn's Grass Mouse or Sanborn's Akodont, is a species of rodent in the genus Abrothrix of family Cricetidae. It is found in southern Argentina and Chile, but may not be distinct from A. longipilis....

            , Abrothrix sanborni
        • Genus Chelemys
          Chelemys
          Chelemys is a genus of South American rodents in the tribe Abrotrichini of family Cricetidae. Three species—Chelemys delfini, Chelemys macronyx, and Chelemys megalonyx—are known, all found in central and southern Chile and Argentina....

          - Long-clawed Mice
          • Magellanic Long-clawed Akodont, Chelemys delfini
          • Andean Long-clawed Mouse
            Andean Long-Clawed Mouse
            Chelemys macronyx, also known as the Andean Long-clawed Mouse or Andean Long-clawed Akodont, is a species of rodent in the genus Chelemys of family Cricetidae. It is found in Argentina and Chile.-Literature cited:...

            , Chelemys macronyx
          • Large Long-clawed Mouse
            Large Long-Clawed Mouse
            Chelemys megalonyx, also known as the Large Long-clawed Mouse or Large Long-clawed Akodont is a species of rodent in the genus Chelemys of family Cricetidae. It is endemic to central Chile.-Literature cited:...

            , Chelemys megalonyx
        • Genus Geoxus - Long-clawed Mole Mouse
          • Long-clawed Mole Mouse
            Long-Clawed Mole Mouse
            Geoxus valdivianus, also known as the Long-clawed Mole Mouse or Valdivian Long-clawed Akodont, is a species of rodent in the tribe Abrotrichini of family Cricetidae found in the Valdivian temperate rain forests and Magellanic subpolar forests of Argentina and Chile. It is the only species in the...

            , Geoxus valdivianus
        • Genus Notiomys - Edward's Long-clawed Mouse
          • Edwards's Long-clawed Mouse, Notiomys edwardsii
        • Genus Pearsonomys - Pearson's Long-clawed Akodont
          • Pearson's Long-clawed Mouse
            Pearson's Long-clawed Mouse
            Pearsonomys annectens, also known as Pearson's Long-clawed Akodont or Pearson's Long-clawed Mouse, is a species of rodent in the tribe Abrotrichini of family Cricetidae, named after American zoologist . It is the only species in the genus Pearsonomys.It is found only in Chile.-Literature...

            , Pearsonomys annectens
      • Tribe Akodontini
        Akodontini
        Akodontini is the second most speciose tribe of the subfamily Sigmodontinae. It includes at least 106 living species in 19 genera and is distributed mainly in the southern half of South America, with only two genera extending into Guyana and Venezuela . It also includes genera previously placed in...

        • Genus Akodon
          Akodon
          Akodon is a genus consisting of South American grass mice. They mostly occur south of the Amazon Basin and along the Andes north to Venezuela, but are absent from much of the basin itself, the far south of the continent, and the lowlands west of the Andes. Akodon is one of the most species-rich...

          - South American Grass Mice
          • Highland Grass Mouse
            Highland Grass Mouse
            Akodon aerosus, also known as the Highland Grass Mouse or Yungas Akodont, is a species of rodent in the family Cricetidae.It is found in the eastern Andes from eastern Ecuador through Peru into central Bolivia.-Literature cited:...

            , Akodon aerosus
          • Colombian Grass Mouse
            Colombian Grass Mouse
            Akodon affinis, also known as the Colombian Grass Mouse or Cordillera Occidental Akodont, is a species of rodent in the family Cricetidae.It is found only in the Cordillera Occidental of Colombia.-Literature cited:...

            , Akodon affinis
          • White-bellied Grass Mouse
            White-bellied Grass Mouse
            Akodon albiventer, also known as the White-bellied Grass Mouse or White-bellied Akodont, is a species of rodent in the family Cricetidae...

            , Akodon albiventer
          • Azara's Grass Mouse
            Azara's Grass Mouse
            Akodon azarae, also known as Azara's Akodont or Azara's Grass Mouse, is a rodent species from South America. It is found from southernmost Brazil through Paraguay and Uruguay into eastern Argentina. It is named after Spanish naturalist Félix de Azara.-Literature cited:*D'Elia, G. and Pardinas, U....

            , Akodon azarae
          • Bogotá Grass Mouse
            Bogota Grass Mouse
            Akodon bogotensis, also known as the Bogotá Grass Mouse or Bogotá Akodont, is a species of rodent in the family Cricetidae.It is found in the Andes eastern and central Colombia and northwestern Venezuela.-Literature cited:...

            , Akodon bogotensis
          • Bolivian Grass Mouse
            Bolivian Grass Mouse
            Akodon boliviensis, also known as the Bolivian Grass Mouse or Bolivian Akodont, is a species of rodent in the family Cricetidae. It is found in the Andes from southeastern Peru through Bolivia into northwestern Argentina.-Literature cited:...

            , Akodon boliviensis
          • Budin's Grass Mouse
            Budin's Grass Mouse
            Akodon budini, also known as Budin's Akodont or Budin's Grass Mouse, is a species of rodent in the family Cricetidae. It is found in the Andes of northwestern Argentina and adjacent Bolivia. The species is named after Emilio Budin, an Argentine specimen collector who worked with Oldfield...

            , Akodon budini
          • Akodon caenosus
          • Cursor Grass Mouse
            Cursor Grass Mouse
            The Cursor Grass Mouse or Cursorial Akodont , is a rodent species from South America. It is found in Argentina and Brazil....

            , Akodon cursor
          • Day's Grass Mouse
            Day's Grass Mouse
            Day's Grass Mouse is a species of rodent in the family Cricetidae.It is found only in Bolivia....

            , Akodon dayi
          • Dolorous Grass Mouse
            Dolorous Grass Mouse
            The Dolorous Grass Mouse or Córdoba Akodont is a species of rodent in the family Cricetidae.It is found only in Argentina....

            , Akodon dolores
          • Smoky Grass Mouse
            Smoky Grass Mouse
            The Smoky Grass Mouse is a species of rodent in the family Cricetidae. It is found in Argentina, Bolivia and Peru....

            , Akodon fumeus
          • Akodon glaucinus
          • Intelligent Grass Mouse
            Intelligent Grass Mouse
            The Intelligent Grass Mouse or Patagonian Akodont is a species of rodent in the family Cricetidae.It is found in Argentina and Chile.-Bibliography:...

            , Akodon iniscatus
          • Junín Grass Mouse
            Junin Grass Mouse
            The Junín Grass Mouse is a species of rodent in the family Cricetidae.It is found only in Peru.-References:...

            , Akodon juninensis
          • Koford's Grass Mouse
            Koford's Grass Mouse
            Koford's Grass Mouse is a species of rodent in the family Cricetidae.It is found only in Peru. It is named after American biologist Carl B. Koford.-References:...

            , Akodon kofordi
          • Ecuadorian Grass Mouse
            Ecuadorian Grass Mouse
            The Ecuadorian Grass Mouse is a species of rodent in the family Cricetidae.It is found only in Ecuador....

            , Akodon latebricola
          • Lindbergh's Grass Mouse
            Lindbergh's Grass Mouse
            Lindbergh's Grass Mouse, Akodon lindberghi, is a rodent species from South America. It is found in Brazil.-References:**Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea. Pp. 894-1531 in Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds....

            , Akodon lindberghi
          • Altiplano Grass Mouse
            Altiplano Grass Mouse
            The Altiplano Grass Mouse is a species of rodent in the family Cricetidae.It is found in Bolivia, and Peru.-References:...

            , Akodon lutescens
          • Thespian Grass Mouse
            Thespian Grass Mouse
            The Thespian Grass Mouse or Hocicudo-like Akodont is a species of rodent in the family Cricetidae.It is found in Bolivia and Peru....

            , Akodon mimus
          • Molina's Grass Mouse, Akodon molinae
          • Soft Grass Mouse
            Soft Grass Mouse
            The Soft Grass Mouse is a species of rodent in the family Cricetidae.It is found in Ecuador and Peru....

            , Akodon mollis
          • Montane Grass Mouse
            Montane Grass Mouse
            The Montane Grass Mouse, Akodon montensis, is a rodent species from South America. It is found in Argentina, Brazil, Paraguay and Uruguay.-References:*...

            , Akodon montensis
          • Caparaó Grass Mouse
            Caparaó Grass Mouse
            The Caparaó Grass Mouse, Akodon mystax, is a rodent species from South America. It is found in Brazil....

            , Akodon mystax
          • Neuquén Grass Mouse
            Neuquen Grass Mouse
            The Neuquén Grass Mouse is a species of rodent in the family Cricetidae.It is found only in Argentina....

            , Akodon neocenus
          • El Dorado Grass Mouse
            El Dorado Grass Mouse
            The El Dorado Grass Mouse or Utcubamba Akodont is a species of rodent in the family Cricetidae.It is found in Ecuador and Peru....

            , Akodon orophilus
          • Paraná Grass Mouse
            Paraná Grass Mouse
            The Paraná Grass Mouse, Akodon paranaensis, is a South American rodent species of the family Cricetidae. It is found in northeastern Argentina and southeastern Brazil.-References:*...

            , Akodon paranaensis
          • Tarija Akodont
            Tarija Akodont
            The Tarija Akodont is a species in the family Cricetidae native to Bolivia, and possibly Argentina....

            , Akodon pervalens
          • Philip Myers' Akodont, Akodon philipmyersi
          • Akodon polopi
          • Reig's Grass Mouse
            Reig's Grass Mouse
            Reig's Grass Mouse, Akodon reigi, is a South American rodent species found in Brazil and Uruguay. It is named after Argentine biologist Osvaldo Reig .-References:*...

            , Akodon reigi
          • São Paulo Grass Mouse
            Sao Paulo Grass Mouse
            The São Paulo Grass Mouse, Akodon sanctipaulensis, is a rodent species from South America. It is found in Brazil.-References:**Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea. pp. 894–1531 in Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M....

            , Akodon sanctipaulensis
          • Serra do Mar Grass Mouse, Akodon serrensis
          • Cochabamba Grass Mouse
            Cochabamba Grass Mouse
            The Cochabamba Grass Mouse is a species of rodent in the family Cricetidae.It is found only in Bolivia.Its natural habitat is subtropical or tropical moist lowland forests.-Source:...

            , Akodon siberiae
          • White-throated Grass Mouse
            White-throated Grass Mouse
            The White-throated or Grey-bellied Grass Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Bolivia.-References:...

            , Akodon simulator
          • Spegazzini's Grass Mouse
            Spegazzini's Grass Mouse
            Akodon spegazzinii, also known as Spegazzini's Akodont or Spegazzini's Grass Mouse, is a rodent in the genus Akodon found in northwestern Argentina. It occurs in grassland and forest at 400 to 3500 m above sea level...

            , Akodon spegazzinii
          • Puno Grass Mouse
            Puno Grass Mouse
            The Puno Grass Mouse is a species of rodent in the family Cricetidae.It is found in Bolivia and Peru.-References:...

            , Akodon subfuscus
          • Silent Grass Mouse
            Silent Grass Mouse
            The Silent Grass Mouse or Slate-bellied Akodont is a species of rodent in the family Cricetidae. It is found only in Peru.-References:...

            , Akodon surdus
          • Forest Grass Mouse
            Forest Grass Mouse
            Akodon sylvanus, also known as the Forest Grass Mouse or Woodland Akodont, is a species of rodent in the family Cricetidae.It is found only in a small part of northwestern Argentina.-References:...

            , Akodon sylvanus
          • Akodon tartareus
          • Chaco Grass Mouse
            Chaco Grass Mouse
            The Chaco Grass Mouse is a species of rodent in the family Cricetidae.It is found in Argentina, Bolivia, and Paraguay.-References:...

            , Akodon toba
          • Cloud Forest Grass Mouse
            Cloud Forest Grass Mouse
            The Cloud Forest Grass Mouse is a species of rodent in the family Cricetidae.It is found only in Peru.-References:...

            , Akodon torques
          • Variable Grass Mouse
            Variable Grass Mouse
            The Variable Grass Mouse is a species of rodent in the family Cricetidae. It is known only from Bolivia, where it is found at elevations from 400 to 3000 m.-References:...

            , Akodon varius
        • Genus Bibimys
          Bibimys
          Bibimys is a genus of new world rats. Commonly known as the crimson-nosed rats, there are three species:*Bibimys chacoensis - Chaco Crimson-nosed Rat - found in north-east Argentina...

          - Crimson-nosed Rats
          • Chaco Crimson-nosed Rat, Bibimys chacoensis
          • Large-lipped Crimson-nosed Rat, Bibimys labiosus
          • Torres' Crimson-nosed Rat, Bibimys torresi
        • Genus Blarinomys - Brazilian Shrew-Mouse
          • Brazilian Shrew-mouse
            Brazilian Shrew-mouse
            Blarinomys breviceps, also known as the Brazilian Shrew-mouse or the Blarinine Akodont, is a rodent in the tribe Akodontini from the Atlantic Forest of eastern and southeastern Brazil. It is the only species in the genus Blarinomys....

            , Blarinomys breviceps
        • Genus Brucepattersonius
          • Grey-bellied Brucie, Brucepattersonius griserufescens
          • Guaraní Brucie
            Guaraní brucie
            Brucepattersonius guarani, also known as the Guaraní Akodont or Guaraní Brucie, is a South American rodent in the genus Brucepattersonius. It is known from a single specimen from Misiones Province in northeastern Argentina, at the southern end of the Atlantic Forest.-Literature cited:*Duff, A. and...

            , Brucepattersonius guarani
          • Red-bellied Brucie
            Red-bellied Brucie
            Brucepattersonius igniventris, also known as the Red-bellied Akodont or Red-bellied Brucie, is a South American rodent in the genus Brucepattersonius. It is known only from Iporanga, São Paulo, Brazil.-Literature cited:...

            , Brucepattersonius igniventris
          • Ihering's Hocicudo
            Ihering's Hocicudo
            Brucepattersonius iheringi, also known as Ihering's Akodont, Ihering's Hocicudo, or Ihering's Brucie, is a South American rodent in the genus Brucepattersonius. It occurs in Santa Catarina and Rio Grande do Sul, southern Brazil, and nearby Misiones Province, Argentina.-Literature cited:*Christoff,...

            , Brucepattersonius iheringi
          • Misiones Brucie
            Misiones brucie
            Brucepattersonius misionensis, also known as the Misiones Akodont or Misiones Brucie, is a rodent species from South America in the genus Brucepattersonius. It is known from a single individual collected in Misiones Province in northeastern Argentina. Its taxonomic status remains to be determined...

            , Brucepattersonius misionensis
          • Arroyo of Paradise Brucie
            Arroyo of Paradise brucie
            The Arroyo of Paradise brucie, Brucepattersonius paradisus, is a South American rodent species of the family Cricetidae. It is known only from northeastern Argentina....

            , Brucepattersonius paradisus
          • Soricine Brucie
            Soricine Brucie
            The Soricine Brucie, Brucepattersonius soricinus, is a rodent species from South America. It is found in Brazil....

            , Brucepattersonius soricinus
        • Genus Deltamys - Kemp's Grass Mouse
          • Kemp's Grass Mouse
            Kemp's Grass Mouse
            Kemp's Grass Mouse is a species of rodent in the family Cricetidae. It is the only species in the genus Deltamys.It is found in Argentina, Brazil and Uruguay....

            , Deltamys kempi
        • Genus Juscelinomys
          Juscelinomys
          Juscelinomys is a genus of burrowing mice. The name is derived from Brazilian president Juscelino Kubitschek de Oliveira who created the city of Brasilia where the Brasilia Burrowing Mouse was discovered.There are two living species:...

          - Burrowing Mice
          • Brasilia Burrowing Mouse, Juscelinomys candango
          • Rio Guaporé mouse
            Rio Guaporé mouse
            The Rio Guaporé mouse, Juscelinomys guaporensis, is a rodent species in the family Cricetidae. It is known only from a small savanna in eastern Bolivia near the Rio Guaporé.-References:**...

            , Juscelinomys guaporensis
          • Huanchaca mouse
            Huanchaca mouse
            The Huanchaca mouse, Juscelinomys huanchacae, is a rodent species in the family Cricetidae. It is known from savannas in an area at an elevation of 700 m in Serrania Huanchaca, Parque Nacional Noel Kempff Mercado in eastern Bolivia.-References:*...

            , Juscelinomys huanchacae
        • Genus Kunsia
          Kunsia
          Kunsia is the genus of giant rats. There are two South American species, both of which are classified as vulnerable by IUCN:*K. fronto *K. tomentosus...

          - Giant Rats
          • Fossorial Giant Rat
            Fossorial Giant Rat
            The Fossorial Giant Rat is a species of rodent in the family Cricetidae. It is found in Argentina and Brazil. Its natural habitat is dry savanna....

            , Kunsia fronto
          • Woolly Giant Rat
            Woolly Giant Rat
            The Woolly Giant Rat, Kunsia tomentosus, is a burrowing rodent species from South America. It is found in wet grasslands in Bolivia and Brazil, where it feeds on roots and grasses. They prefer elevations from sea level to about one thousand metres above sea level. They create burrows in which to...

            , Kunsia tomentosus
        • Genus Lenoxus - Andean Rat
          • Andean Rat
            Andean Rat
            The Andean Rat is the only species in the genus Lenoxus. It is a rodent in the tribe Akodontini found on the eastern slopes of the Andes of eastern Peru and western Bolivia....

            , Lenoxus apicalis
        • Genus Necromys
          Necromys
          Necromys is a genus of South American sigmodontine rodents allied to Akodon. This genus has also been known as Cabreramys or more recently Bolomys. N. urichi has recently been transferred from Akodon....

          - Bolo Mice
          • Pleasant Bolo Mouse
            Pleasant Bolo Mouse
            The Pleasant Bolo Mouse is a species of rodent in the family Cricetidae. It is found in Bolivia and Peru.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Necromys amoenus
          • Argentine Bolo Mouse
            Argentine bolo mouse
            The Argentine bolo mouse is a species of rodent in the family Cricetidae. It is endemic to central Argentina, where it is found in the pampas and the drier espinal ....

            , Necromys benefactus
          • Rufous-bellied Bolo Mouse
            Rufous-bellied Bolo Mouse
            The Rufous-bellied Bolo Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Bolivia.-References:* Dunnum, J., Vargas, J., Bernal, N. & Jayat, J.P. 2008. . Downloaded on 18 April 2009....

            , Necromys lactens
          • Hairy-tailed Bolo Mouse
            Hairy-tailed Bolo Mouse
            The Hairy-tailed Bolo Mouse, Necromys lasiurus, is a rodent species from South America. It is found in Argentina, Bolivia, Brazil and Paraguay.-References:*...

            , Necromys lasiurus
          • Paraguayan Bolo Mouse
            Paraguayan bolo mouse
            The Paraguayan bolo mouse is a species of rodent in the family Cricetidae. It is known from Bolivia, Paraguay and Peru, and may be present in Argentina and Brazil. It is found at elevations from 300 to 2030 m in a variety of habitats, including cerrado, chaco and heath pampas....

            , Necromys lenguarum
          • Dark Bolo Mouse
            Dark Bolo Mouse
            The Dark Bolo Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Uruguay.-References:* D'elia, G., Pardinas, U., Jayat, J.P., Teta, P. & Patterson., B. 2008. . Downloaded on 19 April 2009....

            , Necromys obscurus
          • Spotted Bolo Mouse
            Spotted Bolo Mouse
            The Spotted Bolo Mouse is a species of rodent in the family Cricetidae.It is found only in Ecuador.-References:...

            , Necromys punctulatus
          • Temchuk's Bolo Mouse
            Temchuk's Bolo Mouse
            Temchuk's Bolo Mouse is a species of rodent in the family Cricetidae.It is found only in Argentina.-References:* Pardinas, U., D'Elia, G. & Teta, P. 2008. . Downloaded on 19 April 2009....

            , Necromys temchuki
          • Northern Grass Mouse
            Northern Grass Mouse
            The Northern Grass Mouse is a species of rodent in the family Cricetidae.It is found in Brazil, Colombia, Trinidad and Tobago, and Venezuela.-References:...

            , Necromys urichi
        • Genus Oxymycterus
          Oxymycterus
          Oxymycterus is the genus of hocicudos. They are rat-like animals endemic to South America.Species listing:Oxymycterus is the genus of hocicudos. They are rat-like animals endemic to South America.Species listing:...

          - Hocicudos
          • Argentine Hocicudo
            Argentine Hocicudo
            The Argentine Hocicudo is a species of rodent in the family Cricetidae.It is found only in northern Argentina in yungas habitat.-References:...

            , Oxymycterus akodontius
          • Amazon Hocicudo, Oxymycterus amazonicus
          • Angular Hocicudo
            Angular Hocicudo
            The Angular Hocicudo, Oxymycterus angularis, is a rodent species from South America. It is found in Brazil....

            , Oxymycterus angularis
          • Caparao Hocicudo
            Caparaó Hocicudo
            The Caparaó Hocicudo, Oxymycterus caparoae, is a rodent species from South America. It is found in Brazil.-References:*...

            , Oxymycterus caparaoe
          • Atlantic Forest Hocicudo
            Atlantic Forest hocicudo
            The Atlantic Forest hocicudo is a species of rodent in the family Cricetidae.It is found only in southeastern Brazil, where it lives in the Atlantic Forest and associated wetlands at altitudes from sea level to 800 m....

            , Oxymycterus dasytrichus
          • Spy Hocicudo
            Spy Hocicudo
            The Spy Hocicudo is a species of rodent in the family Cricetidae.It is found only in Paraguay.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Oxymycterus delator
          • Small Hocicudo
            Small Hocicudo
            The Small Hocicudo is a species of rodent in the family Cricetidae.It is found in Bolivia and Peru on the eastern slopes of the Andes at elevations from 610 to 3500 m.-References:...

            , Oxymycterus hiska
          • Hispid Hocicudo
            Hispid Hocicudo
            The Hispid Hocicudo, Oxymycterus hispidus, is a rodent species from South America. It is found in Argentina and Brazil, in the Atlantic Forest....

            , Oxymycterus hispidus
          • Quechuan Hocicudo
            Quechuan Hocicudo
            Oxymycterus hucucha, also known as the Quechuan Hocicudo, is a species of rodent in the genus Oxymycterus of family Cricetidae from South America. It is found only in a small region of the Andes in central Bolivia, where it lives in cloud forest at altitudes from 2600 to 3000 m.Exceptionally small...

            , Oxymycterus hucucha
          • Incan Hocicudo
            Incan Hocicudo
            The Incan Hocicudo is a species of rodent in the family Cricetidae.It is found in Bolivia and Peru.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Oxymycterus inca
          • Cook's Hocicudo
            Cook's hocicudo
            Cook's hocicudo is a species of rodent in the family Cricetidae. It is found only in southern Uruguay, where it lives in wetlands, moist grasslands and scrub. The specifies is named after American zoologist Joseph “José” A. Cook....

            , Oxymycterus josei
          • Long-nosed Hocicudo
            Long-nosed Hocicudo
            The Long-nosed Hocicudo, Oxymycterus nasutus, is a South American rodent species found in southeastern Brazil and Uruguay. It hunts grubs and worms under the cover of leaves, logs, and stones. It has a long, flexible nose, and usually utilizes the tunnels and pathways created by other...

            , Oxymycterus nasutus
          • Paramo Hocicudo
            Paramo Hocicudo
            The Paramo Hocicudo is a species of rodent in the family Cricetidae.It is found in Argentina, Bolivia, and Peru.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Oxymycterus paramensis
          • Quaestor Hocicudo
            Quaestor hocicudo
            The quaestor hocicudo is a species of rodent in the family Cricetidae. It is found in southeastern Brazil and northeastern Argentina, where it lives in forest and moist and dry scrub....

            , Oxymycterus quaestor
          • Robert's Hocicudo
            Robert's Hocicudo
            Robert's Hocicudo, Oxymycterus roberti, is a rodent species from South America. It is found in Brazil and Paraguay....

            , Oxymycterus roberti
          • Red Hocicudo
            Red Hocicudo
            The Red Hocicudo, Oxymycterus rufus, is a rodent species from South America. It is found in Argentina, Brazil and Uruguay....

            , Oxymycterus rufus
          • Oxymycterus wayku
        • Genus Podoxymys - Roraima Mouse
          • Roraima Mouse
            Roraima Mouse
            The Roraima Mouse is a species of rodent in the family Cricetidae. It is the only species in the genus Podoxymys.It is found only in Guyana.-References:...

            , Podoxymys roraimae
        • Genus Scapteromys
          Scapteromys
          Scapteromys is a genus of South American rodents in the tribe Akodontini of family Cricetidae. Two species are known, found in northern Argentina, southern Brazil, Paraguay and Uruguay...

          - Swamp Rat
          • Argentine Swamp Rat
            Argentine swamp rat
            The Argentine swamp rat, Scapteromys aquaticus, is a semiaquatic rodent species from South America. It is found in northeastern Argentina and Paraguay, where it lives in freshwater marshes and along the southern coast of the Río de la Plata estuary, as well as in forests.-References:*...

            , Scapteromys aquaticus
          • Waterhouse's Swamp Rat
            Waterhouse's Swamp Rat
            Waterhouse's Swamp Rat, Scapteromys tumidus, is a semiaquatic rodent species from South America. It is found in southern Brazil, Uruguay and northern Argentina, where it lives in freshwater and salt marshes, as well as open grassland of the pampas....

            , Scapteromys tumidus
        • Genus Thalpomys
          Thalpomys
          Thalpomys is a genus of South American rodents in the tribe Akodontini of family Cricetidae. Two species are known, both found in the cerrado tropical savanna ecoregion of central Brazil. They are as follows:* Cerrado Mouse...

          - Cerrado Mice
          • Cerrado Mouse
            Cerrado Mouse
            The Cerrado Mouse, Thalpomys cerradensis, is a rodent species from South America. It is found in Brazil....

            , Thalpomys cerradensis
          • Hairy-eared Cerrado Mouse
            Hairy-eared Cerrado Mouse
            The Hairy-eared Cerrado Mouse, Thalpomys lasiotis, is a rodent species from South America. It is found in Brazil....

            , Thalpomys lasiotis
        • Genus Thaptomys - Ebony Akodont
          • Blackish Grass Mouse
            Blackish Grass Mouse
            The Blackish Grass Mouse, Thaptomys nigrita, also formerly called the Ebony Akodont, is a rodent species from South America. It is found in Argentina, Brazil, Paraguay and Uruguay. It is the only species in the genus Thaptomys....

            , Thaptomys nigrita
      • Tribe Phyllotini
        • Genus Andalgalomys
          Andalgalomys
          Andalgalomys is a genus of rodent in the family Cricetidae.It contains the following species:* Olrog's Chaco Mouse * Pearson's Chaco Mouse * Roig's Chaco Mouse...

          - Chaco Mice
          • Olrog's Chaco Mouse
            Olrog's Chaco Mouse
            Olrog's Chaco Mouse is a species of South American rodent in the family Cricetidae, endemic to Argentina. The natural habitat of the species is hot deserts. It is named after Swedish-Argentine biologist Claes C. Olrog....

            , Andalgalomys olrogi
          • Pearson's Chaco Mouse
            Pearson's Chaco Mouse
            Pearson's Chaco Mouse is a species of rodent in the family Cricetidae.It is found in Bolivia and Paraguay.-References:...

            , Andalgalomys pearsoni
          • Roig's Chaco Mouse, Andalgalomys roigi
        • Genus Andinomys - Andean Mouse
          • Andean Mouse
            Andean Mouse
            The Andean Mouse is a species of rodent in the family Cricetidae. It is the only species in the genus Andinomys.It is found in Argentina, Bolivia, Chile, and Peru.-References:...

            , Andinomys edax
        • Genus Auliscomys
          Auliscomys
          Auliscomys is a genus of rodent in the family Cricetidae.It contains the following species:* Bolivian Big-eared Mouse * Painted Big-eared Mouse * Andean Big-eared Mouse...

          - Big-Eared Mice
          • Bolivian Big-eared Mouse
            Bolivian Big-eared Mouse
            The Bolivian Big-eared Mouse is a species of rodent in the family Muridae.It is found in Bolivia, Chile, and Peru....

            , Auliscomys boliviensis
          • Painted Big-eared Mouse
            Painted Big-eared Mouse
            The Painted Big-eared Mouse is a species of rodent in the family Cricetidae. It is found in Bolivia and Peru, and possibly Chile....

            , Auliscomys pictus
          • Andean Big-eared Mouse
            Andean Big-eared Mouse
            The Andean Big-eared Mouse is a species of rodent in the family Cricetidae.It is found in Argentina, Bolivia, Chile, and Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Auliscomys sublimis
        • Genus Calomys - Vesper Mice
          • Bolivian Vesper Mouse
            Bolivian Vesper Mouse
            The Bolivian Vesper Mouse is a species of rodent in the family Cricetidae. It is found in Argentina, Bolivia and perhaps Peru....

            , Calomys boliviae
          • Crafty Vesper Mouse
            Crafty Vesper Mouse
            The Crafty Vesper Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Paraguay.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Calomys callidus
          • Large Vesper Mouse
            Large Vesper Mouse
            The Large Vesper Mouse, Calomys callosus, is a rodent species from South America. It is found in Argentina, Bolivia, Brazil and Paraguay.It is particularly notable as the vector of Bolivian hemorrhagic fever....

            , Calomys callosus
          • Calomys cerqueirai
            Calomys cerqueirai
            Calomys cerqueirai is a species of rodent in the genus Calomys from southeastern Brazil. Distinct from other Calomys in its karyotype and characters of the fur, it is known only from two places in Minas Gerais...

          • Caatinga Vesper Mouse
            Caatinga vesper mouse
            The caatinga vesper mouse, Calomys expulsus, is a rodent species in the family Cricetidae from South America. It is endemic to eastern Brazil, where it is found in open savanna and thorny scrub habitats....

            , Calomys expulsus
          • Fecund Vesper Mouse
            Fecund vesper mouse
            The fecund vesper mouse is a species of rodent in the family Cricetidae. It is known only from Bolivia, where it is found in the yungas and Tucumano boliviano forest ecoregions at elevations from 600 to 2700 m. It is regarded by some authorities as conspecific with C. boliviae....

            , Calomys fecundus
          • Hummelinck's Vesper Mouse
            Hummelinck's Vesper Mouse
            Hummelinck's Vesper Mouse is a species of rodent in the family Cricetidae.It is found in Aruba, Brazil, Colombia, the Netherlands Antilles, and Venezuela.-References:...

            , Calomys hummelincki
          • Small Vesper Mouse
            Small Vesper Mouse
            The Small Vesper Mouse, Calomys laucha, is a rodent species from South America. It is found in Argentina, Bolivia, Brazil, Paraguay and Uruguay. It is one of the hosts of hantavirus, causing Hantavirus pulmonary syndrome...

            , Calomys laucha
          • Andean Vesper Mouse
            Andean Vesper Mouse
            The Andean Vesper Mouse is a species of rodent in the family Cricetidae.It is found in Argentina, Bolivia, Chile, and Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Calomys lepidus
          • Drylands Vesper Mouse
            Drylands Vesper Mouse
            The Drylands Vesper Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Paraguay.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Calomys musculinus
          • Peruvian Vesper Mouse
            Peruvian Vesper Mouse
            The Peruvian Vesper Mouse is a species of rodent in the family Cricetidae. It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Calomys sorellus
          • Delicate Vesper Mouse
            Delicate Vesper Mouse
            The Delicate Vesper Mouse, Calomys tener, is a South American rodent species of the family Cricetidae. It is found in Argentina, Bolivia and Brazil.- References :**...

            , Calomys tener
          • Tocantins Vesper Mouse
            Tocantins Vesper Mouse
            The Tocantins Vesper Mouse, Calomys tocantinsi, is a rodent species from South America. It is found in Brazil....

            , Calomys tocantinsi
          • Córdoba vesper mouse
            Córdoba vesper mouse
            The Córdoba vesper mouse is a South American rodent species of the family Cricetidae. It is endemic to the area of Córdoba Province, central Argentina, where it is found in the espinal ....

            , Calomys venustus
        • Genus Chinchillula - Altiplano Chinchilla Mouse
          • Northern Grass Mouse
            Northern Grass Mouse
            The Northern Grass Mouse is a species of rodent in the family Cricetidae.It is found in Brazil, Colombia, Trinidad and Tobago, and Venezuela.-References:...

            , Chinchillula sahamae
        • Genus Eligmodontia
          Eligmodontia
          The genus Eligmodontia consists of five or six species of South American sigmodontine mice restricted to Bolivia, Chile, and Argentina. Species of Eligmodontia occur along the eastern side of the Andes Mountains, in Patagonia, and in the Chaco thorn forest of South America. They can be found in...

          - Silky Desert Mice
          • Monte Gerbil Mouse
            Monte Gerbil Mouse
            The Monte Gerbil Mouse or Monte Laucha is a species of rodent in the family Cricetidae.It is found only in Argentina.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Eligmodontia moreni
          • Andean Gerbil Mouse
            Andean Gerbil Mouse
            The Andean Gerbil Mouse or Altiplano Laucha is a species of rodent in the family Cricetidae.It is found in Argentina, Bolivia, Chile, and Peru.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Eligmodontia puerulus
          • Eligmodontia hirtipes (recently separated from Eligmodontia puerulus)
          • Morgan's Gerbil Mouse
            Morgan's Gerbil Mouse
            Morgan's Gerbil Mouse , also known as the Western Patagonian Laucha, is a species of rodent in the family Cricetidae.It is found in Argentina and Chile.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Eligmodontia morgani
          • Eastern Patagonian Laucha, Eligmodontia typus
          • Highland Gerbil Mouse
            Highland Gerbil Mouse
            Eligmodontia typus is a species of rodent in the family Cricetidae. It is found in Argentina and possibly also Chile. The northernmost population might represent a distinct species, E. bolsonensis, to which the common name Highland Gerbil Mouse would apply...

            , Eligmodontia (typus) bolsonensis
        • Genus Euneomys
          Euneomys
          Euneomys is a genus of rodent in the family Cricetidae.It contains the following species:* Patagonian Chincilla Mouse * Burrowing Chincilla Mouse * Biting Chincilla Mouse...

          - Chinchilla Mice
          • Patagonian Chincilla Mouse
            Patagonian Chincilla Mouse
            The Patagonian Chincilla Mouse is a species of rodent in the family Cricetidae. It is found in Tierra del Fuego and neighboring areas of southernmost Argentina and Chile....

            , Euneomys chinchilloides
          • Burrowing Chincilla Mouse, Euneomys fossor
          • Biting Chincilla Mouse
            Biting Chincilla Mouse
            The Biting Chincilla Mouse is a species of rodent in the family Cricetidae. It is found in west central Argentina and nearby areas of Chile, where it inhabits highland meadows, probably at at elevations of 1740 to 3000 m....

            , Euneomys mordax
          • Peterson's Chincilla Mouse
            Peterson's Chincilla Mouse
            Peterson's Chincilla Mouse is a species of rodent in the family Cricetidae. It is found in west central and southern Argentina and nearby areas of Chile. The species is named after American paleontologist Olaf A. Peterson ....

            , Euneomys petersoni
        • Genus Galenomys - Garlepp's Mouse
          • Garlepp's Mouse
            Garlepp's Mouse
            Garlepp's Mouse is a species of rodent in the family Cricetidae. It is the only species in the genus Galenomys. It is found in western Bolivia, southern Peru and possibly Chile at elevations over 3,000 m in the Altiplano.-References:*Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea...

            , Galenomys garleppi
        • Genus Graomys
          Graomys
          Graomys is a genus of rodent in the family Cricetidae.It contains the following species:* Central Leaf-eared Mouse * Pale Leaf-eared Mouse * Edith's Leaf-eared Mouse...

          - Leaf-eared Mice
          • Central Leaf-eared Mouse
            Central leaf-eared mouse
            The central leaf-eared mouse is a species of rodent in the family Cricetidae. It is known only from central Argentina. Prior to 1994, it was considered a subspecies of G. griseoflavus....

            , Graomys centralis
          • Pale Leaf-eared Mouse
            Pale Leaf-Eared Mouse
            The Pale Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Bolivia.-References:* Baillie, J. 1996. . Downloaded on 19 July 2007....

            , Graomys domorum
          • Edith's Leaf-eared Mouse
            Edith's Leaf-Eared Mouse
            Edith's Leaf-eared Mouse is a species of rodentin the family Cricetidae.It is known only from Argentina, where it was found in a montane grassland on Otro Cerro at an elevation of 3000 m.-References:...

            , Graomys edithae
          • Gray Leaf-eared Mouse
            Gray Leaf-eared Mouse
            The Gray Leaf-eared Mouse, Graomys griseoflavus, is a rodent species from South America. It is found in Argentina, Bolivia, Brazil and Paraguay; its habitat includes the Gran Chaco.-References:*...

            , Graomys griseoflavus
        • Genus Ichthyurodon
          • Ichthyurodon ameghinoi
        • Genus Irenomys - Chilean Climbing Mouse
          • Chilean Climbing Mouse
            Chilean Climbing Mouse
            Irenomys tarsalis, also known as the Chilean Climbing Mouse, Chilean Tree Mouse, or Long-footed Irenomys, is a rodent found in Chile, from about 36° to 46°S, and in adjacent Argentina, mainly in forests...

            , Irenomys tarsalis
        • Genus Loxodontomys
          Loxodontomys
          Loxodontomys is a genus of South American rodents in the tribe Phyllotini of family Cricetidae. Two species are known, found in Argentina and Chile. They are as follows:* Southern Big-eared Mouse...

          • Southern Big-eared Mouse
            Southern Big-eared Mouse
            The southern big-eared mouse , also known as the southern pericote, is a species of rodent in the family Cricetidae. It is found in Argentina and Chile, and is one of only two species in its genus...

            , Loxodontomys micropus
          • Pikumche pericote
            Pikumche pericote
            The Pikumche pericote is a species of rodent in the family Cricetidae. It is known only from central Chile, where its range includes xeric shrublands .-References:...

            , Loxodontomys pikumche
        • Genus Neotomys - Andean Swamp Rat
          • Andean Swamp Rat
            Andean Swamp Rat
            The Andean Swamp Rat is a species of rodent in the family Cricetidae. It is the only species in the genus Neotomys.It is found in Argentina, Bolivia, Chile, and Peru.-References:...

            , Neotomys ebriosus
        • Genus Olympicomys
          • Olympicomys vossi
        • Genus Phyllotis
          Phyllotis
          Phyllotis is a genus of rodent in the family Cricetidae.It contains the following species:* Phyllotis alisosiensis* Friendly Leaf-eared Mouse * Andean Leaf-eared Mouse...

          - Leaf-Eared Mice
          • Friendly Leaf-eared Mouse
            Friendly Leaf-eared Mouse
            The Friendly Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found only in Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Phyllotis amicus
          • Andean Leaf-eared Mouse
            Andean Leaf-eared Mouse
            The Andean Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found in Ecuador and Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Phyllotis andium
          • Anita's Leaf-eared Mouse
            Anita's leaf-eared mouse
            Anita's leaf-eared mouse is a species of rodent in the family Cricetidae. It was discovered in Tucumán Province in northwestern Argentina in alder forest of the upper part of the Southern Andean Yungas ecoregion, on the eastern slopes of the Andes. The species is terrestrial and nocturnal, and was...

            , Phyllotis anitae
          • Buenos Aires Leaf-eared Mouse
            Buenos Aires Leaf-eared Mouse
            The Buenos Aires Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found only in Argentina.-References:* Contreras, L. 1996. . Downloaded on 9 July 2007....

            , Phyllotis bonariensis
          • Capricorn Leaf-eared Mouse
            Capricorn Leaf-eared Mouse
            The Capricorn Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found in Argentina and Bolivia.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Phyllotis caprinus
          • Darwin's Leaf-eared Mouse
            Darwin's Leaf-eared Mouse
            Darwin's Leaf-eared Mouse is a species of rodent in the family Cricetidae. It has terrestrial habits and is endemic to coastal central Chile....

            , Phyllotis darwini
          • Definitive Leaf-eared Mouse
            Definitive Leaf-eared Mouse
            The Definitive Leaf-eared Mouse is a species of rodent in the family Cricetidae. It is found only in west central Peru, in rocky and shrub-covered areas at elevations between 2600 and 3000 m.-References:...

            , Phyllotis definitus
          • Haggard's Leaf-eared Mouse
            Haggard's Leaf-eared Mouse
            Haggard's Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found only in Ecuador.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Phyllotis haggardi
          • Lima Leaf-eared Mouse
            Lima leaf-eared mouse
            The Lima leaf-eared mouse is a species of rodent in the family Cricetidae. It is found in a variety of habitats on the western slopes of the Andes from northern Chile to west-central Peru at elevations from sea level to 4000 m....

            , Phyllotis limatus
          • Master Leaf-eared Mouse
            Master Leaf-eared Mouse
            The Master Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found in Chile and Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Phyllotis magister
          • Osgood's Leaf-eared Mouse
            Osgood's Leaf-eared Mouse
            Osgood's Leaf-eared Mouse is a species of rodent in the family Cricetidae. It is found only in the Altiplano of northeastern Chile. The species is named after American zoologist Wilfred Hudson Osgood.-References:...

            , Phyllotis osgoodi
          • Bunchgrass Leaf-eared Mouse
            Bunchgrass Leaf-eared Mouse
            The Bunchgrass Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found in Argentina, Bolivia, and Peru.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Phyllotis osilae
          • Wolffsohn's Leaf-eared Mouse
            Wolffsohn's Leaf-eared Mouse
            Wolffsohn's Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is found only in Bolivia.-References:* Baillie, J. 1996. . Downloaded on 9 July 2007....

            , Phyllotis wolffsohni
          • Yellow-rumped Leaf-eared Mouse
            Yellow-rumped Leaf-eared Mouse
            The Yellow-rumped Leaf-eared Mouse is a species of rodent in the family Cricetidae.It is the most widespread member of the genus, being found in or near the Andes of Argentina, Chile, Bolivia, and Peru, from sea level to 5,000 m.-References:* Baillie, J. 1996. . Downloaded on 9 July...

            , Phyllotis xanthopygus
        • Genus Punomys
          Punomys
          Punomys is a genus of rodent in the family Cricetidae.It contains the following species:* Eastern Puna Mouse * Puna Mouse...

          - Puna Mouse
          • Eastern Puna Mouse
            Eastern puna mouse
            The eastern puna mouse is a species of rodent in the family Cricetidae. It is endemic to southern Peru, where it is found in moist areas within puna grassland at elevations of 4500 to 4800 m in the Cordillera Carabaya section of the Cordillera Oriental.-References:*Musser, G. G. and M. D....

            , Punomys kofordi
          • Puna Mouse
            Puna Mouse
            The Puna Mouse is a species of rodent in the family Cricetidae. It is endemic to southern Peru, where it is found in puna habitat at elevations of 4400 to 4900 m in the Cordillera Occidental.-References:...

            , Punomys lemminus
        • Genus Reithrodon
          Reithrodon
          Reithrodon is a genus of rodent in the family Cricetidae.It contains the following species:* Bunny Rat * Naked-soled Conyrat...

          - Bunny Rat
          • Bunny Rat
            Bunny Rat
            The Bunny Rat is a species of rodent in the family Cricetidae. It is found in Argentina, Chile, and Uruguay....

            , Reithrodon auritus
          • Naked-soled Conyrat
            Naked-soled conyrat
            The naked-soled conyrat is a species of rodent in the family Cricetidae. It is found in grasslands in northern Argentina, southern Brazil, and Uruguay....

            , Reithrodon typicus
        • Genus Salinomys
          • Salt Flat Mouse
            Salt flat mouse
            The salt flat mouse is a sigmodontine rodent species in the family Cricetidae from South America. It is the only species in the genus Salinomys. Its habitat is scrublands bordering salt flats in central western Argentina at elevations around 400 m...

            , Salinomys delicatus
        • Genus Tafimys
          • Tafimys powelli
        • Genus Tapecomys - Primordial Tapecua
          • Primordial Tapecua
            Primordial Tapecua
            The Primordial Tapecua is a species of medium sized rodent in the family Cricetidae. The type locality is in southeastern Bolivia. It is the only known species of the genus Tapecomys. Two specimens were found in 1991 in a forested region at an elevation of 1500 m near the village of Tapecua in the...

            , Tapecomys primus
    • Incertae sedis
      • Genus Juliomys
        Juliomys
        Juliomys is a genus of South American rodents of the family Cricetidae. Four species are known, all found in Argentina and Brazil. They are as follows:* Juliomys anoblepas * Juliomys ossitenuis*Juliomys pictipes...

        • Juliomys ossitenuis
        • Juliomys pictipes
        • Juliomys rimofrons
      • Genus Megaoryzomys
        • Galápagos Giant Rat
          Galápagos Giant Rat
          Megaoryzomys curioi, also known as the Galápagos Giant Rat, is an extinct species of sigmodontine rodent, known only from Santa Cruz Island in the Galápagos Islands. It likely met its demise when European settlers introduced invasive species to the island. It is the only species in the genus...

          , Megaoryzomys curioi
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