Gyraulus
Encyclopedia
Gyraulus is a genus
of small, mostly air-breathing, freshwater snail
s, aquatic
pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails.
The genus Gyraulus is known from the Early Cretaceous to the present. Fossils attributed to Gyraulus sp. have been found in the lakebottom sediments of the Yixian Formation
in China, dating to 125 million years ago.
The minute species Gyraulus crista
, although technically a pulmonate gastropod, does not use air for respiration but instead has a mantle cavity which is full of water.
subgenus Armiger W. Hartmann, 1843
subgenus Carinogyraulus Polinski, 1929
subgenus Gyraulus Charpentier, 1837
subgenus Lamorbis Starobogatov, 1967
subgenus Nautilinus Mousson, 1872
subgenus Torquis Dall, 1905
subgenus ?
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of small, mostly air-breathing, freshwater snail
Freshwater snail
A freshwater snail is one kind of freshwater mollusc, the other kind being freshwater clams and mussels, i.e. freshwater bivalves. Specifically a freshwater snail is a gastropod that lives in a watery non-marine habitat. The majority of freshwater gastropods have a shell, with very few exceptions....
s, aquatic
Aquatic animal
An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...
pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails.
The genus Gyraulus is known from the Early Cretaceous to the present. Fossils attributed to Gyraulus sp. have been found in the lakebottom sediments of the Yixian Formation
Yixian Formation
The Yixian Formation is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans 11 million years during the early Cretaceous period...
in China, dating to 125 million years ago.
The minute species Gyraulus crista
Gyraulus crista
Gyraulus crista, commonly called the Nautilus ramshorn, is a minute species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.Synonyms:* Armiger crista* Planorbis crista...
, although technically a pulmonate gastropod, does not use air for respiration but instead has a mantle cavity which is full of water.
Shell description
Shell of the species within this genus are small, and are mostly almost planispiral in their coiling.Species
Species within the genus Gyraulus include:subgenus Armiger W. Hartmann, 1843
- Gyraulus cristaGyraulus cristaGyraulus crista, commonly called the Nautilus ramshorn, is a minute species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.Synonyms:* Armiger crista* Planorbis crista...
(Linnaeus, 1758) - Nautilus ramshorn
subgenus Carinogyraulus Polinski, 1929
- Gyraulus crenophilus Hubendick & Radoman, 1959
- Gyraulus fontinalis Hubendick & Radoman, 1959
- Gyraulus lychnidicus Hesse, 1928
- Gyraulus stankovici Hadzisce, 1955
- Gyraulus trapezoides Polinski, 1929
subgenus Gyraulus Charpentier, 1837
- Gyraulus acronicusGyraulus acronicusGyraulus acronicus is a small species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.-Distribution:The distribution of this species is Holarctic:...
(A. Férussac, 1807) - Gyraulus albidus Radoman, 1953
- Gyraulus albusGyraulus albusGyraulus albus is a small species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.-Distribution:Palearctic:* Czech Republic - least concern * Germany...
(O. F. Müller, 1774) - White ramshorn - Gyraulus chinensisGyraulus chinensisGyraulus chinensis is a species of small freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.- Distribution :The non-indigenous distribution for this species includes:...
(Dunker, 1848) - Gyraulus ioanis Gloer & Pesic, 2007
- Gyraulus janinensis (Mousson, 1859)
- Gyraulus meierbrooki Gloer & Pesic, 2007
- Gyraulus piscinarum (Bourguignat, 1852)
- Gyraulus shasi Gloer & Pesic, 2007
- Gyraulus stroemi (Westerlund, 1881)
subgenus Lamorbis Starobogatov, 1967
- Gyraulus ripariusGyraulus ripariusGyraulus riparius is a species of small freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.-Distribution:The distribution of this species is Holarctic:...
- Gyraulus rossmaessleriGyraulus rossmaessleriGyraulus rossmaessleri is a small species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.-Distribution:...
(Auerswald, 1852)
subgenus Nautilinus Mousson, 1872
- Gyraulus clymene (Shuttleworth, 1852)
subgenus Torquis Dall, 1905
- Gyraulus laevisGyraulus laevisGyraulus laevis is a small species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.-Distribution:The distribution of this species is Holarctic:...
(Alder, 1838) - Gyraulus parvusGyraulus parvusGyraulus parvus is a small species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.-Distribution:This species is native to North America:It is not listed in IUCN red list - not evaluated...
(Say, 1817)
subgenus ?
- Gyraulus bekaensisGyraulus bekaensisGyraulus bekaensis is a species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.The specific name bekaensis is named after the Beqaa Governorate, where it occurs....
Glöer & Bössneck, 2007 - Gyraulus convexiusculus http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=191788&lvl=3&p=mapview&p=has_linkout&p=blast_url&p=genome_blast&lin=f&keep=1&srchmode=1&unlock
- Gyraulus costulatusGyraulus costulatusGyraulus costulatus is a species of air-breathing freshwater snail, aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.-Distribution:...
(Krauss, 1848) - Gyraulus deflectus http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=220642&lvl=3&p=mapview&p=has_linkout&p=blast_url&p=genome_blast&lin=f&keep=1&srchmode=1&unlock
- Gyraulus mauritianusGyraulus mauritianusGyraulus mauritianus is a species of small, mostly air-breathing, freshwater snail, aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails. This species is endemic to Mauritius....
(Morelet, 1876)