List of marine reptiles - AbsoluteAstronomy.com

Following is a list of marine reptile
Marine reptile
Marine reptiles are reptiles which have become secondarily adapted for an aquatic or semi-aquatic life in a marine environment.The earliest marine reptiles arose in the Permian period during the Paleozoic era...

s, reptile

Reptile

Reptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors...

s which are adapted to life in a marine

Marine (ocean)

Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...

environment.

Extant

The following marine reptiles are species which are currently extant or recently extinct.

Sea snakes

Aipysurus

Aipysurus eydouxii

Spine-tailed Seasnake Aipysurus eydouxii is a species of sea snake.This species is found in Western Australia, Northern Territory, Queensland, the South China Sea,the Gulf of Thailand, Indonesia, Peninsular Malaysia, Vietnam, and New Guinea....

(Spine-tailed Sea Snake)

Aipysurus laevis (Olive sea snake)

Astrotia stokesii
Astrotia stokesii
Commonly known as Stokes' seasnake, Astrotia stokesii is a large species of sea snake found in tropical Indo-Pacific oceanic waters.-Description:...

(Stoke's Sea Snake)
Disteira

Disteira major

Olive-headed or greater seasnake Disteira major is a species of sea snake.-Distribution:Indian Ocean , S New Guinea, New Caledonia, Australia -References:...

(Olive-headed or greater Sea Snake)

Disteira nigrocincta

Disteira nigrocincta is a species of sea snake.Distribution:Indian Ocean: India, Bangladesh, Sri Lanka, Myanmar , Thailand, MalaysiaType locality: Sundarbans, Bengal-References:...

Disteira walli

Wall's Sea Snake Disteira walli is a species of sea snake found in the North Indian Ocean; Malay Archipelago.-References:* Kharin V E 1989 A new sea snake species of the genus Disteira from the waters of the Malay Archipelago [in Russian]. VESTNIK ZOOLOGII 1989 : 29-32....

(Wall's Sea Snake)

Enhydrina schistosa
Enhydrina schistosa
Beaked seasnake is a species of sea snake.-Description:...

(Beaked Sea Snake, hook-nosed Sea Snake, common Sea Snake, Valakadyn Sea Snake)
Hydrophis

Hydrophis belcheri

The Faint-banded Sea snake is a species of elapid sea snake. It has a friendly temperament and would normally have to be subjected to severe mistreatment before biting...

(Faint-banded Sea Snake, Belcher's Sea Snake)

Hydrophis bituberculatus

Peters' Sea Snake Hydrophis bituberculatus is a species of sea snake.Found in the Indian Ocean .-Bibliography:* Peters, W.C.H. 1872 Hr. W. Peters las über den Hydrus fasciatus Schneider und einige andere Seeschlangen. Monatsber. Akad. Berlin 1872: 855-856* Peters, Wilhem Carl Hartwig 1873 Über den...

(Peters' Sea Snake)

Hydrophis brooki

Hydrophis brooki is a species of sea snake.-Distribution:Indian Ocean , Gulf of Thailand-References:...

Hydrophis caerulescens

The Dwarf Seasnake is a species of sea snake.-Anatomy:Diagnostic Characters.- Scales on thickest part of body quadrangular or hexagonal in shape, feebly imbricate or juxtaposed; 14-18 maxillary teeth behind front fangs; 2 anterior tempo-rals; scales in 31-43 rows on the neck, 38-54 around midbody...

(Dwarf Sea Snake)

Hydrophis cyanocinctus

Annulated Sea Snake Hydrophis cyanocinctus is a species of sea snake.-Description:Head moderate; eye shorter than its distance from the mouth in the adult...

(Annulated Sea Snake, blue-banded Sea Snake)

Hydrophis fasciatus

Striped Sea Snake Hydrophis fasciatus is a species of sea snake.-Anatomy:Head small, body long and slender anteriorly; scales on thickest part of body subquadrangular or hexagonal in shape, juxtaposed or slightly imbricate; 5-6 maxillary teeth behind fangs; 2 anterior temporals; body scales in...

(Striped Sea Snake)

Hydrophis inornatus

Plain Seasnake Hydrophis inornatus is a species of sea snake.-Distribution:South Chinese Sea , Sri LankaAustralia -Bibliography:...

(Plain Sea Snake)

Hydrophis klossi

Kloss' Sea Snake Hydrophis klossi is a species of sea snake.-Etymology and taxonomic history:The snake is named after Cecil Boden Kloss , director of the Raffles Museum in Singapore from 1923 to 1932.-Bibliography:...

(Kloss' Sea Snake)

Hydrophis lapemoides

Persian Gulf Sea Snake Hydrophis lapemoides is a species of sea snake.-Distribution:Indian Ocean, Persian Gulfcoasts off Bahrain, Oman, United Arab Emirates, Iran, Pakistan, Sri Lanka, India, Malaysia , Singapore, Thailand...

(Persian Gulf Sea Snake)

Hydrophis mammilaris

Bombay Sea Snake is a species of sea snake.Distribution:Indian Ocean...

(Bombay Sea Snake)

Hydrophis melanocephalus

Slender-necked Seasnake Hydrophis melanocephalus is a species of sea snake.-Distribution:*South Chinese Sea*Japan *Coasts of Taiwan and Guangdong northward to Zhejiang...

(Slender-necked Sea Snake)

Hydrophis obscurus

Russell's Sea Snake Hydrophis obscurus is a species of sea snake.-Bibliography:* Russell 1801 A continuation of an account of Indian serpents: containing descriptions and figures from specimens and drawings, transmitted from various parts of India to the hon. Court of Directors of the East Indian...

(Russell's Sea Snake)

Hydrophis ornatus

Ornate Reef seasnake Hydrophis ornatus is a species of sea snake.-Bibliography:* Bussarawitt,S.; Rasmussen, A.R. & Andersen, M. 1989 A preliminary study on sea snakes from Phuket Harbor, Phuket Island, Thailand. Nat. Hist. Bull. Siam Soc., Bangkok 37 : 209-225* Mittleman, M. B...

(Ornate Reef Sea Snake)

Hydrophis semperi

Hydrophis semperi, known in some circles as Garman's sea snake, is a rare sea snake found only in a single lake on the island of Luzon in the Philippines. It is noted for being one of two known species of sea snake that is known to be found almost-exclusively in freshwater.H...

(Garman's Sea Snake)

Hydrophis spiralis

Yellow Sea Snake Hydrophis spiralis is a species of sea snake.-Anatomy:This is perhaps the longest species of seasnake .Diagnostic Characters- Scales on thickest part of body with rounded or pointed tips, imbricate; 6-7 maxillary teeth behind fangs; normally 1 anterior temporal; 6-8 upper labials;...

(Yellow Sea Snake)

Hydrophis stricticollis

Collared Sea Snake Hydrophis stricticollis is a species of sea snake.-Anatomy:Scales on thickest part of body subquadrangular or hexagonal in shape, feebly imbricate or juxtaposed; 8-11 maxillary teeth behind fangs; head small, body long and slender anteriorly, posteriorly 2.5 to 3 times thicker...

(Collared Sea Snake)

Kerilia jerdonii
Kerilia jerdonii
Jerdon's Sea Snake is a species of sea snake.-Description:M. A. Smith describes the species as follows:...

(Jerdon's Sea Snake)
Kolpophis annandalei
Kolpophis annandalei
Bighead Sea Snake Kolpophis annandalei is a species of sea snake.Distribution:Indian Ocean -References:...

(Bighead Sea Snake)
Lapemis

Lapemis curtus

The Shaw's Sea Snake is a species of sea snake.Distribution:Persian Gulf Indian Ocean South China Sea north to the coasts of Fujian and Shandong...

(Shaw's Sea Snake)

Lapemis hardwickii

The Spine-bellied Sea snake, or Hardwicke's Spine-bellied Sea snake, is a species of sea snake.-Description:*Body short, stout, neck region not less than half as thick at midbody;...

(Hardwicke's spine-bellied Sea Snake)

Laticauda

Laticauda colubrina

The colubrine sea krait, banded sea krait or yellow-lipped sea krait is a species of sea snake found in tropical Indo-Pacific oceanic waters....

(Colubrine sea krait, yellow-lipped sea krait)

Laticauda laticaudata

The blue-lipped sea krait is a species of sea snake.-Diagnostic Characters:Ventrals large, one-third to more than one half the width of the body; nostrils lateral; nasals separated by internasals; 19 longitudinal rows of imbricate scales at midbody; no azygous prefrontal shield; rostral undivided;...

(Blue-lipped sea krait)

Microcephalophis

Microcephalophis cantoris

Microcephalophis cantoris is a species of sea snake.Diagnostic Characters- Head small, body long and slender anteriorly; scales on thickest part of body juxtaposed; 5-6 maxillary teeth behind fangs; 23-25 scale rows around neck, 41-48 around thickest part of body ; ventrals divided by a...

Microcephalophis gracilis

The Graceful Small-headed Sea Snake or Slender Sea Snake Microcephalophis gracilis is a species of sea snake.-Diagnostic Characters:...

(Graceful small-headed Sea Snake, slender Sea Snake)

Pelamis platurus (Yellowbelly Sea Snake, Pelagic Sea Snake)
Thalassophina

Thalassophina viperina

Thalassophina viperina is a species of sea snake.Diagnostic Characters- Scales hexagonal, juxtaposed, in 27-34 rows on the neck, 37-50 at midbody; ventrals 226-274, anteriorly about half the width of the body, narrowing posterior to about twice the width of the adjacent scales, or slightly less;...

Thalassophis anomalus

Anomalous Sea Snake is a species of sea snake.Distribution: South Chinese Sea , Indian Ocean -References:...

(Anomalous Sea Snake)

Sea turtle
Sea turtle
Sea turtles are marine reptiles that inhabit all of the world's oceans except the Arctic.-Distribution:...

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Flatback Turtle

The flatback sea turtle is a sea turtle that is endemic to the continental shelf of Australia. Flatback turtles belong to the Cheloniidae, or sea turtle, superfamily and are the only species found in the genus Natator....

Green sea turtle

Green Sea Turtle

The Green sea turtle or green turtle is a large sea turtle of the family Cheloniidae. It is the only species in the genus Chelonia. Its range extends throughout tropical and subtropical seas around the world, with two distinct populations in the Atlantic and Pacific Oceans...

Hawksbill turtle

The hawksbill sea turtle is a critically endangered sea turtle belonging to the family Cheloniidae. It is the only extant species in its genus. The species has a worldwide distribution, with Atlantic and Pacific subspecies. E. imbricata imbricata is the Atlantic subspecies, while E...

Kemp's Ridley

Kemp's ridley sea turtle , or Atlantic ridley sea turtle is the rarest sea turtle and is critically endangered. It is one of two living species in the genus Lepidochelys Kemp's ridley sea turtle (Lepidochelys kempii), or Atlantic ridley sea turtle is the rarest sea turtle and is critically...

Leatherback Sea Turtle

The leatherback sea turtle is the largest of all living sea turtles and the fourth largest modern reptile behind three crocodilians. It is the only living species in the genus Dermochelys. It can easily be differentiated from other modern sea turtles by its lack of a bony shell. Instead, its...

Loggerhead Sea Turtle

The loggerhead sea turtle , or loggerhead, is an oceanic turtle distributed throughout the world. It is a marine reptile, belonging to the family Cheloniidae. The average loggerhead measures around long when fully grown, although larger specimens of up to have been discovered...

Olive Ridley

The olive ridley sea turtle , also known as the Pacific ridley, is a species of sea turtle.- Description :The olive ridley is a small extant sea turtle, with an adult carapace length averaging 60 to 70 cm 1...

Ridley sea turtle

Ridley sea turtles are a genus of sea turtles comprising two species: Kemp's ridley sea turtle and the olive ridley sea turtle.Kemp's ridley sea turtles are currently on the New York and federal endangered species lists.-Anatomy:...

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Extinct

From the Permian

Permian

The PermianThe term "Permian" was introduced into geology in 1841 by Sir Sir R. I. Murchison, president of the Geological Society of London, who identified typical strata in extensive Russian explorations undertaken with Edouard de Verneuil; Murchison asserted in 1841 that he named his "Permian...

to the present day there have been numerous groups of extinct

Extinction

In biology and ecology, extinction is the end of an organism or of a group of organisms , normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point...

reptiles that have adapted to life in the marine realm:

Lizards

Aigialosauridae: Late Cretaceous
Late Cretaceous
The Late Cretaceous is the younger of two epochs into which the Cretaceous period is divided in the geologic timescale. Rock strata from this epoch form the Upper Cretaceous series...

Dolichosauridae: Late Cretaceous

Adriosaurus

Adriosaurus is an extinct genus of aquatic lizard that lived about 95 million years ago. It was snake-like and grew 10 to 12 inches. This is the first fossil record of vestigial limbs in lizards, and gives scientists a glimpse back to the time when terrestrial lizards evolved to be limbless...

Dolichosaurus

Dolichosaurus is an extinct genus of marine squamate of the Upper Cretaceous Cenomanian chalk deposits of England. Sister-group relationships between coniasaurs, dolichosaurs, Aigialosauridae and Mosasauridae are an unresolved polytomy. The paleobiology of Dolichosaurus is reconstructed as...

Judeasaurus

Judeasaurus is an extinct genus of small, aquatic varanoid lizard related to the mosasauroids. The only known specimen is from the Late Cretaceous of the Middle East, though its exact provenance is uncertain.-Description:...

Kaganaias
Kaganaias
Kaganaias is an extinct genus of mosasauroid lizard that lived in what is now Japan during the Early Cretaceous. Kaganaias was semi-aquatic and is the only known aquatic squamate to be found in Asia and is also the only known aquatic squamate known from before the Cenomanian stage of the Cretaceous...

: Late Cretaceous

Mosasaur
Mosasaur
Mosasaurs are large extinct marine lizards. The first fossil remains were discovered in a limestone quarry at Maastricht on the Meuse in 1764...

s: Late Cretaceous
Mosasaurinae
Mosasaurinae
Mosasaurinae is a subfamily of mosasaurs, a diverse group of Late Cretaceous marine squamates.Russell defined the Mosasurinae as differing from all other mosasaurs as follows: "Small rostrum present or absent anterior to premaxillary teeth. Fourteen or more teeth present in dentary and maxilla...

Carinodens

Carinodens is a genus of mosasaur. It was named in 1969 as a replacement for Compressidens, which was already in use for a mollusk. Measuring approximately in length, it is one of the smallest known mosasaurs. It is widely considered a sister taxon to Globidens. It also had round, blunt teeth for...

Clidastes

Clidastes is an extinct genus of mosasaur lizard from marine environments of the Late Cretaceous.Clidastes was an agile and fast swimmer that cruised the surface or shallow waters hunting for fish, flying reptiles and anything that got too close.- Appearance :Clidastes was the smallest of the...

Dallasaurus

Dallasaurus is a basal mosasauroid from the Upper Cretaceous of North America. The genus is based upon two partial skeletons recovered from the Arcadia Park Shale , approximately 15 meters above its contact with the older Kamp Ranch Limestone in Dallas County in north-central Texas...

Globidens

Globidens is an extinct genus of mosasaur lizard.Globidens alabamaensis was first described by Gilmore . A second species was described by Russell . The third North American species Globidens ("Globe teeth") is an extinct genus of mosasaur lizard.Globidens alabamaensis was first described by...

Mosasaurus

Mosasaurus is a genus of mosasaur, carnivorous, aquatic lizards, somewhat resembling flippered crocodiles, with elongated heavy jaws. The genus existed during the Maastrichtian age of the Cretaceous period , around 70-65 millions years ago in the area of modern Western Europe and North America...

Plotosaurus

Plotosaurus is an extinct genus of mosasaur from the Upper Cretaceous of Fresno County, California. Originally named Kolposaurus by Berkeley paleontologist Charles Lewis Camp in 1942, it was changed to Plotosaurus in 1951 when Camp discovered the name had already been assigned to a type of...

Prognathodon

Prognathodon is an extinct genus of marine reptile belonging to the mosasaur family. It had protective bony rings surrounding its eye sockets, indicating it lived in deep water. its fossil remains have been found in the U.S.A , Canada , Belgium, New Zealand, Morocco and The Netherlands...

Halisaurinae
Halisaurinae
Halisaurinae is a subfamily of mosasaurs, a diverse group of Late Cretaceous marine squamates.Bardet et al. diagnosed the Halsaurinae as all mosasaurs more closely related to Halisaurus than Moanasaurus...

Eonatator

Eonatator is a genus of halisaurine mosasaur from the Upper Cretaceous of North America and Europe. Originally, this taxon was included within Halisaurus, but was placed in its own genus...

Halisaurus

Halisaurus is an extinct genus of marine lizard belonging to the mosasaur family. With a length of 3–4 m , it was small compared to most other mosasaurs. It was named by Othniel Charles Marsh in 1869, but renamed Baptosaurus by Marsh in 1870, who thought the name was already in use by a fish...

Tylosaurinae
Tylosaurinae
Tylosaurinae is a subfamily of mosasaurs, a diverse group of Late Cretaceous marine lizards.Russell defined the Tylosaurinae as follows: "Large rostrum present anterior to premaxillary teeth. Twelve or more teeth in dentary and maxilla. Cranial nerves X, XI, and XII leave lateral wall of...

Hainosaurus

Hainosaurus is an extinct genus of marine lizard belonging to the mosasaur family. It was one of the largest mosasaurs, though its size has been revised more than once. At first it was estimated to be , and the largest mosasaurid. During the 1990s, its size was revised to long; more recently,...

Tylosaurus

Tylosaurus was a mosasaur, a large, predatory marine lizard closely related to modern monitor lizards and to snakes.-Paleobiology:...

Taniwhasaurus

Taniwhasaurus is an extinct genus of mosasaur, a carnivorous, marine reptile which inhabited New Zealand, Japan and Antarctica. The genus was a close relative of the genera Tylosaurus and Hainosaurus.-Species:-T...

Plioplatecarpinae
Plioplatecarpinae
Plioplatecarpinae is a subfamily of mosasaurs, a diverse group of late Cretaceous marine squamates.Russell defined the Plioplatecarpinae as follows: Small rostrum present or absent anterior to premaxillary teeth. Cranial nerves X, XI, XII leave lateral wall of opisthotic through single foramen...

Platecarpus

Platecarpus is an extinct genus of aquatic lizard belonging to the mosasaur family, living around 75 million years ago during the end of the Cretaceous period. Fossils have been found in Belgium and the United States as well as a possible specimen in Africa. Platecarpus probably fed on fish,...

Plioplatecarpus

Plioplatecarpus is a genus of mosasaur lizard. Like all mosasaurs, it lived in the late Cretaceous period, about 83.5 million years ago.-Description:...

Selmasaurus

Selmasaurus is a genus of medium-sized plioplatecarpine mosasaur from the Upper Cretaceous Mooreville Chalk Formation of western Alabama...

Sauropterygia
Sauropterygia
Sauropterygia were a group of very successful aquatic reptiles that flourished during the Mesozoic before they became extinct at the end of the era. They were united by a radical adaptation of their shoulder, designed to support powerful flipper strokes...

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Placodont
Placodont
Placodonts were a group of marine reptiles that lived during the Triassic period, becoming extinct at the end of the period. It is believed that they were part of Sauropterygia, the group that includes Plesiosaurs...

s: Triassic
Triassic
The Triassic is a geologic period and system that extends from about 250 to 200 Mya . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events...

Cyamodus

Cyamodus was a placodont, known from fossil remains discovered in Germany, in the early-to-mid-19th century and was named by Christian Erich Hermann von Meyer, in 1863. The fossils have been dated to the Triassic Period, from the Anisian to Ladinian stages...

Henodus

Henodus chelyops was a placodont of the Late Triassic period during the early Carnian age. Fossils of Henodus chelyops were found in Tübingen, Germany. It was around in length....

Paraplacodus

Paraplacodus was a Placodont from the middle Triassic period, during the Anisian to Ladinian stages. The fossils were uncovered in Northern Italy and the species was named in 1931 by Bernhard Peyer. Paraplacodus means "Almost Placodus", and thus far only one species, P...

Placochelys

Placochelys is an extinct genus of reptile from the Triassic period of Germany.Placochelys looked remarkably similar to a sea turtle, and grew to about in length. It had a flat shell covered with knobbly plates, and a compact skull...

Placodus

Placodus was a genus of marine reptiles, belonging to the order Placodontia, which swam in the shallow seas of the middle Triassic period...

Psephoderma

Psephoderma is a genus of placodont that was very similar to its relatives Placochelys and Cyamodus. Psephoderma had a flattened skull and a narrow, straight rostrum. Inside this skull, embedded in the jaws, were rounded teeth specialized for crushing the shellfish it ate...

Nothosaur
Nothosaur
Nothosaurs were Triassic marine sauropterygian reptiles that may have lived like seals of today, catching food in water but coming ashore on rocks and beaches. They averaged about in length, with a long body and tail. The feet were paddle-like, and are known to have been webbed in life, to help...

s: Triassic

Lariosaurus

Lariosaurus is an extinct genus of nothosaur from the Triassic period of northern Italy. With a length of just , it was one of the smallest known nothosaurs...

Nothosaurus

Nothosaurus is an extinct genus of sauropterygian reptile from the Triassic period, approximately 240-210 million years ago, with fossils being distributed from North Africa and Europe to China...

Pachypleurosaur
Pachypleurosaur
Pachypleurosaurs were primitive sauropterygian reptiles that vaguely resembled aquatic lizards, and were limited to the Triassic period. They were elongate animals, ranging in size from 20 cm to about a meter in length, with small heads, long necks, paddle-like limbs, and long deep tails. The...

s: Triassic

Anarosaurus

Anarosaurus is an extinct genus of early plesiosaur that lived in the Middle Triassic period ....

Dactylosaurus

Dactylosaurus is a genus of nothosaur in the family Pachypleurosauridae. Along with Anarosaurus, Dactylosaurus was one of the earliest known pachypleurosaurs to come from Europe.-Etymology:...

Keichousaurus

Keichousaurus is a genus of marine reptile in the pachypleurosaur family which went extinct at the close of the Triassic in the Triassic-Jurassic extinction event. The name derives from Kweichow in China where the first fossil specimen was discovered in 1957...

Neuticosaurus

Neuticosaurus is an extinct genus of marine reptile belonging to the nothosaur order, from Germany and France. At 18 cm long, it was one of the smallest nothosaurs. Neuticosaurus probably fed on small fish....

Pistosaurus
Pistosaurus
Pistosaurus longaevus is an extinct genus of aquatic sauropterygian reptile closely related to plesiosaurs. Fossils have been found in France and Germany, and date to the Middle Triassic.- Appearance :...

:Middle Triassic

Plesiosaurs: Early Jurassic
Early Jurassic
The Early Jurassic epoch is the earliest of three epochs of the Jurassic period...

- Late Cretaceous
Plesiosaurus
Plesiosaurus
Plesiosaurus was a genus of large marine sauropterygian reptile that lived during the early part of the Jurassic Period, and is known by nearly complete skeletons from the Lias of England...
Cimoliasauridae
Cryptoclididae
Cryptoclididae
Cryptoclididae is a family of medium-sized plesiosaurs that lived from the Middle Jurassic to the Late Cretaceous. In 2010, Kaiwhekea was transferred to Leptocleididae and Aristonectes was transferred to Elasmosauridae.-Appearance:...

Cryptoclidus

Cryptoclidus was a genus of plesiosaur from the Middle Jurassic period of England.-Discovery:Cryptoclidus is a plesiosaur whose specimens include adult and juvenile skeletons, and remains which have been found in various degrees of preservation in England, Northern France, Russia, and South America...

Microcleidus

Microcleidus is an extinct genus of sauropterygian reptile belonging to the plesiosaur suborder. It was about the size of a whale.Species include: Microcleidus homalospondylus and Microcleidus macropterus . The species has 40 neck vertebrae and a short tail of 28 vertebrae.-External links:*...

Muraenosaurus

Muraenosaurus is an extinct genus of sauropterygian reptile, from the Middle Jurassic of Europe. Fossils have been found in England and France....

Elasmosauridae
Elasmosauridae
Elasmosauridae was the family of plesiosaurs. They had the longest necks of the plesiosaurs and survived from the Late Triassic to the end of the Cretaceous. They had a diet of fish and shelless cephalopods.-Size:...

Elasmosaurus

Elasmosaurus + σαυρος sauros 'lizard') is a genus of plesiosaur with an extremely long neck that lived in the Late Cretaceous period , 80.5 million years ago.-Description:...

Futabasaurus

Futabasaurus is a genus of plesiosaur from the Late Cretaceous of Fukushima, Japan. Described and named in 2006, it was assigned to the family Elasmosauridae. The length was about 7 m, and the weight was about 3~4 tons. Futabasaurus is the first elasmosaurid found in Japan. The type...

Hydrotherosaurus

Hydrotherosaurus is an extinct genus of elasmosaurid plesiosaur from the Upper Cretaceous of Fresno County, California, measuring up to 13 m in length. The species H. alexandrae was named for its discoverer, Annie Montague Alexander by Samuel Paul Welles.-References:* Welles, S. P. 1943...

Libonectes

Libonectes is an extinct genus of sauropterygian reptile belonging to the plesiosaur order. It is known from a single fossil specimen found in the Britton Formation of Texas, dated to the lower Turonian stage of the late Cretaceous period.The animal was very similar to the related Thalassomedon,...

Mauisaurus

Mauisaurus is a genus of plesiosaur that lived during the Late Cretaceous period around 80 to 69 million years ago in what is now New Zealand. It was the largest plesiosaur, and perhaps the largest marine reptile in New Zealand waters at the time. Mauisaurus haasti is the only known species of the...

Thalassomedon

Thalassomedon is a genus of plesiosaur, named by Welles in 1943. Greek, thalassa, "sea" and Greek, medon, "lord, ruler": Sea lord.-Introduction:...

Polycotylidae
Polycotylidae
Polycotylidae is a family of plesiosaurs from the Cretaceous, a sister group to the Leptocleididae.With their short necks and large elongated heads, they resemble the pliosaurs, but closer phylogenetical studies indicate that they share many common features with the plesiosauridae and elasmosauridae...

Dolichorhynchops

Dolichorhynchops is an extinct genus of polycotylid plesiosaur from the Late Cretaceous of North America, containing three species, D. osborni, D. herschelensis and D. tropicensis. Dolichorhynchops was an oceangoing prehistoric reptile...

Edgarosaurus

Edgarosaurus is a genus of polycotylid plesiosaur, containing one species, E. muddi. The type specimen was found in Early Cretaceous rocks in the state of Montana in the USA. At the time, this location was covered by part of the Western Interior Seaway.-References:Druckenmiller, PS, 2002...

Manemergus

Manemergus is a genus of polycotylid plesiosaur from the Late Cretaceous of Morocco. Manemergus was described in 2005 and contains only one species, M. anguirostris...

Sulcusuchus

Sulcusuchus is a genus of polycotylid plesiosaur from the Late Cretaceous of Argentina....

Thililua

Thililua is a genus of polycotylid plesiosaur, containing one species, T. longicollis. The name Thililua is derived from that of an ancient aquatic god from local Berber mythology; longicollis refers to the animal's long neck. Thililua has been found in Late Cretaceous rocks in the High Atlas...

Trinacromerum

Trinacromerum is an extinct genus of sauropterygian reptile belonging to the plesiosaur suborder. It lived during the Late Cretaceous period in what is now Kansas. It was 3 meters long. Its teeth show it fed on small fish....

Pliosaurs: Early Jurassic - Late Cretaceous

Kronosaurus

Kronosaurus is an extinct genus of short-necked pliosaur. It was among the largest pliosaurs, and is named after the leader of the Greek Titans, Cronus.-Discovery and species:Kronosaurus lived in the Early Cretaceous Period ....

Liopleurodon

Liopleurodon is a genus of large, carnivorous marine reptile belonging to the Pliosauroidea, a clade of short-necked plesiosaurs. Two species of Liopleurodon lived during the Callovian stage of the Middle Jurassic Period , while the third, L. rossicus, lived during the Late Jurassic...

Macroplata

Macroplata , meaning, , is an extinct genus of Early Jurassic basal plesiosaur which grew up to in length. Like other plesiosaurs, Macroplata probably lived on a diet of fish, using its sharp needle-like teeth to catch prey. Its shoulder bones were fairly large, indicating a powerful forward...

Peloneustes

Peloneustes is an extinct genus of sauropterygian reptile belonging to the family Pliosauridae. It is known from the Callovian aged deposits of the Oxford clay formation of England...

Rhomaleosaurus

Rhomaleosaurus is an extinct genus of Early Jurassic rhomaleosaurid pliosauroid known from Northamptonshire and from Yorkshire of the United Kingdom. It was first named by Harry Seeley in 1874 and the type species is Rhomaleosaurus cramptoni...

Umoonasaurus

Umoonasaurus is an extinct genus of plesiosaur belonging to the family Leptocleididae. This genus lived approximately 115 million years ago in shallow seas covering parts of what is now Australia. It was a relatively small animal around 2.5 m long...

Crocodilia
Crocodilia
Crocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...

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Thalattosuchia
Thalattosuchia
Thalattosuchia is the name given to a clade of marine crocodylomorphs from the Early Jurassic to the Early Cretaceous that had a cosmopolitan distribution. They are sometimes colloquially referred to as marine crocodiles or sea crocodiles, though they are not actually members of Crocodilia.The term...

: Early Jurassic - Early Cretaceous
Metriorhynchidae
Metriorhynchidae
Metriorhynchidae is an extinct family of metriorhynchoid crocodyliforms from the Middle Jurassic to the Early Cretaceous period of Europe, North America and South America. Metriorhynchids are fully aquatic crocodyliforms. Their forelimbs were small and paddle-like, and unlike living crocodilians,...

Aggiosaurus

Dakosaurus

Dakosaurus is an extinct genus within the family Metriorhynchidae that lived during the Late Jurassic and Early Cretaceous. It was large, with teeth that were serrated and compressed lateromedially . The genus was established by Friedrich August von Quenstedt in 1856 for an isolated tooth named...

Enaliosuchus

Geosaurus

Geosaurus is an extinct genus of marine crocodyliform within the family Metriorhynchidae that lived during the Late Jurassic to the Early Cretaceous. Geosaurus was a carnivore that spent much, if not all, its life out at sea...

Metriorhynchus

Metriorhynchus is an extinct genus of marine crocodyliform that lived in the oceans during the Middle to Late Jurassic. Metriorhynchus was named by the German palaeontologist Christian von Meyer in 1830. Metriorhynchus was a carnivore that spent much, if not all, its life out at sea...

Neustosaurus

Neustosaurus is a genus of marine crocodyliform from the Early Cretaceous. Neustosaurus was a carnivore that spent much, if not all, its life out at sea...

Purranisaurus

Purranisaurus is an extinct genus of marine crocodyliform from the Middle to Late Jurassic period of Chile and Argentina. Rusconi originally regarded Purranisaurus potens to be a plesiosaur; however, Gasparini demonstrated that it was in fact a metriorhynchid crocodyliform, and that may be a...

Teleidosaurus

Teleidosaurus is an extinct genus of carnivorous metriorhynchoid crocodyliform from Middle Jurassic deposits of Normandy, France...

Teleosauridae
Teleosauridae
The teleosaurids were marine crocodyliforms similar to the modern gharial that lived from the Early Jurassic to the Early Cretaceous. They had long snouts, indicative of piscivory and were the closest relatives to the Metriorhynchidae, the Mesozoic crocodilians that returned to the sea and evolved...

Machimosaurus

Machimosaurus is an extinct genus of teleosaurid crocodyliform from the Late Jurassic and Early Cretaceous . The type species, Machimosaurus hugii, was found in France. Other fossils have been found in Austria, England, Germany, Portugal and Switzerland...

Pelagosaurus

Pelagosaurus is an extinct genus of thalattosuchian crocodyliform that lived during the Toarcian stage of the Lower Jurassic, around 183 Ma to 175 Ma , in shallow epicontinental seas that covered much of what is now Western Europe...

Platysuchus

Platysuchus is an extinct genus of teleosaurid crocodyliform from the Early Jurassic . All specimens are known from Germany.- External links:*...

Teleosaurus

Teleosaurus was an extinct genus of teleosaurid crocodyliform that lived during the Middle Jurassic. It was approximately in length. Teleosaurus had highly elongate jaws, similar to those of a modern gharial. It had a long, slender, body, with a sinuous tail that would have helped propel it...

Steneosaurus

Steneosaurus is an extinct genus of teleosaurid crocodyliform from the Early Jurassic to Early Cretaceous . Fossil specimens have been found in England, France, Germany, Switzerland and Morocco.-Species:...

Sea turtle
Sea turtle
Sea turtles are marine reptiles that inhabit all of the world's oceans except the Arctic.-Distribution:...

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- Allopleuron
  Allopleuron
  Allopleuron hoffmani was a giant sea turtle, now extinct....
- Archelon
  Archelon
  Archelon is a genus of extinct sea turtle, the largest that has ever been documented.-Discovery:...
- Pneumatoarthrus
  Pneumatoarthrus
  Pneumatoarthrus is a Cretaceous sea turtle first identified by Edward Drinker Cope as a hadrosaur in 1870. The fossils were found in the chalk beds of Kansas. It may be synonymous with the better known Atlantochelys, and therefore a close relative of the giant sea turtle Archelon.-References:Baird,...
- Protostega
  Protostega
  Protostega gigas is an extinct species of marine turtle. It was first collected from the Smoky Hill Chalk of western Kansas in 1871, and named by E.D. Cope...

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Extant

Sea snakes

Sea turtleSea turtleSea turtles are marine reptiles that inhabit all of the world's oceans except the Arctic.-Distribution:...s

Extinct

Lizards

SauropterygiaSauropterygiaSauropterygia were a group of very successful aquatic reptiles that flourished during the Mesozoic before they became extinct at the end of the era. They were united by a radical adaptation of their shoulder, designed to support powerful flipper strokes...ns

CrocodiliaCrocodiliaCrocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...ns

Sea turtleSea turtleSea turtles are marine reptiles that inhabit all of the world's oceans except the Arctic.-Distribution:...s

Sea turtle
Sea turtle
Sea turtles are marine reptiles that inhabit all of the world's oceans except the Arctic.-Distribution:...

s

Sauropterygia
Sauropterygia
Sauropterygia were a group of very successful aquatic reptiles that flourished during the Mesozoic before they became extinct at the end of the era. They were united by a radical adaptation of their shoulder, designed to support powerful flipper strokes...

ns

Crocodilia
Crocodilia
Crocodilia is an order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period . They are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria...

ns

Sea turtle
Sea turtle
Sea turtles are marine reptiles that inhabit all of the world's oceans except the Arctic.-Distribution:...

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