''Somatogyrus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of very small

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does in ...

and

brackish water Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...

snail A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class G ...

s that have an operculum, aquatic gastropod

micromollusc A micromollusk is a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also ...

s in the family

Lithoglyphidae Lithoglyphidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks. This family is in the superfamily Truncatelloidea and in the clade Littorinimorpha (according to the taxonomy of the Gastropoda by ...

Species

Species within the genus ''Somatogyrus'' include: *

Reverse pebblesnail The reverse pebblesnail, scientific name ''Somatogyrus alcoviensis'', is a species of small freshwater snail with a gill and an operculum (gastropod), operculum, an aquatic animal, aquatic gastropod mollusc in the family Hydrobiidae. This speci ...

, ''

Somatogyrus alcoviensis The reverse pebblesnail, scientific name ''Somatogyrus alcoviensis'', is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Hydrobiidae. This species is endemic to Newton County, Ge ...

'' * ''

Somatogyrus aldrichi ''Somatogyrus'' is a genus of very small freshwater and brackish water snails that have an operculum, aquatic gastropod micromolluscs in the family Lithoglyphidae. Species Species within the genus ''Somatogyrus'' include: * Reverse pebbl ...

'' (W) *

Ouachita pebblesnail The Ouachita pebblesnail, scientific name †''Somatogyrus amnicoloides'', was a species of minute freshwater snail with an operculum, an aquatic gastropod mollusc or micromollusc in the family Hydrobiidae. This species was endemic to th ...

, ''

Somatogyrus amnicoloides The Ouachita pebblesnail, scientific name †''Somatogyrus amnicoloides'', was a species of minute freshwater snail with an operculum, an aquatic gastropod mollusc or micromollusc in the family Hydrobiidae. This species was endemic to the ...

'' *

Golden pebblesnail The golden pebblesnail, scientific name ''Somatogyrus aureus'', is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae. This species is endemic to Alabama and T ...

, ''

Somatogyrus aureus The golden pebblesnail, scientific name ''Somatogyrus aureus'', is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae. This species is endemic to Alabama and T ...

'' *

Angular pebblesnail The angular pebblesnail, scientific name ''Somatogyrus biangulatus'', is a species of very small freshwater snail with an operculum, an aquatic operculate gastropod The gastropods (), commonly known as snails and slugs, belong to a large ...

, '' Somatogyrus biangulatus'' *

Knotty pebblesnail The knotty pebblesnail, scientific name ''Somatogyrus constrictus'', of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae. This species is endemic to Alabama in the United St ...

, ''

Somatogyrus constrictus The knotty pebblesnail, scientific name ''Somatogyrus constrictus'', of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae. This species is endemic to Alabama in the United St ...

'' *

Coosa pebblesnail The Coosa pebblesnail, scientific name ''Somatogyrus coosaensis'', is a species of small freshwater snails with a gill and an operculum, aquatic gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic ...

, ''

Somatogyrus coosaensis The Coosa pebblesnail, scientific name ''Somatogyrus coosaensis'', is a species of small freshwater snails with a gill and an operculum, aquatic gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic ...

'' *

Thick-lipped pebblesnail The thick-lipped pebblesnail, scientific name ''Somatogyrus crassilabris'', was a species of freshwater snail with an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species was endemic to Baxter County, Arkansas i ...

, ''

Somatogyrus crassilabris The thick-lipped pebblesnail, scientific name ''Somatogyrus crassilabris'', was a species of freshwater snail with an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species was endemic to Baxter County, Arkansas i ...

'' *

Stocky pebblesnail The stocky pebblesnail (''Somatogyrus crassus'') is a species of very small freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the United States. ...

, ''

Somatogyrus crassus The stocky pebblesnail (''Somatogyrus crassus'') is a species of very small freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the United States. ...

'' *

Tennessee pebblesnail The Tennessee pebblesnail (''Somatogyrus currierianus'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to the Tennessee ...

, ''

Somatogyrus currierianus The Tennessee pebblesnail (''Somatogyrus currierianus'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to the Tennessee ...

'' *

Hidden pebblesnail The hidden pebblesnail, scientific name ''Somatogyrus decipiens'', is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae. This species is endemic to Alabama in ...

, ''

Somatogyrus decipiens The hidden pebblesnail, scientific name ''Somatogyrus decipiens'', is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Lithoglyphidae. This species is endemic to Alabama in ...

'' *

Sandbar pebblesnail The Sandbar pebblesnail (''Somatogyrus depressus'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae Lithoglyphidae is a family of small freshwater snails with gi ...

, '' Somatogyrus depressus'' *

Ovate pebblesnail The ovate pebblesnail, scientific name ''Somatogyrus excavatus'', is a species of very small freshwater snail with an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Lauderdale County, Alabama ...

, ''

Somatogyrus excavatus The ovate pebblesnail, scientific name ''Somatogyrus excavatus'', is a species of very small freshwater snail with an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Lauderdale County, Alabama ...

'' * Cherokee pebblesnail, ''

Somatogyrus georgianus The Cherokee pebblesnail (''Somatogyrus georgianus'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to the Tennessee, Caha ...

'' *

Fluted pebblesnail The fluted pebblesnail, scientific name ''Somatogyrus hendersoni'', is a species of very small freshwater snail with an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the United St ...

, ''

Somatogyrus hendersoni The fluted pebblesnail, scientific name ''Somatogyrus hendersoni'', is a species of very small freshwater snail with an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the United St ...

'' * Granite pebblesnail, '' Somatogyrus hinkleyi'' *

Atlas pebblesnail The atlas pebblesnail (''Somatogyrus humerosus'') is a species of minute freshwater snail that has an operculum, an aquatic operculate gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States. Its natural hab ...

, ''

Somatogyrus humerosus The atlas pebblesnail (''Somatogyrus humerosus'') is a species of minute freshwater snail that has an operculum, an aquatic operculate gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of ...

'' *

Ohio pebblesnail The Ohio pebblesnail (''Somatogyrus integra'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to the Ohio River The Ohio ...

, ''

Somatogyrus integra The Ohio pebblesnail (''Somatogyrus integra'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to the Ohio River and tributa ...

'' *

Dwarf pebblesnail The dwarf pebblesnail (''Somatogyrus nanus)'' is a species of very small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States. Its natural habitat ...

, ''

Somatogyrus nanus The dwarf pebblesnail (''Somatogyrus nanus)'' is a species of very small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States. Its natural habitat ...

'' *

Moon pebblesnail The Moon pebblesnail, scientific name ''Somatogyrus obtusus'', is a species of very small freshwater snail that has an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the United St ...

, ''

Somatogyrus obtusus The Moon pebblesnail, scientific name ''Somatogyrus obtusus'', is a species of very small freshwater snail that has an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the United St ...

'' *

Sparrow pebblesnail The sparrow pebblesnail, scientific name ''Somatogyrus parvulus'', is a species of minute freshwater snail that has an operculum, an aquatic operculate gastropod micromollusc in the family Lithoglyphidae. This species is endemic to Tennessee in ...

, ''

Somatogyrus parvulus The sparrow pebblesnail, scientific name ''Somatogyrus parvulus'', is a species of minute freshwater snail that has an operculum, an aquatic operculate gastropod micromollusc in the family Lithoglyphidae. This species is endemic to Tennessee ...

'' *

Shale pebblesnail The shale pebblesnail (''Somatogyrus pennsylvanicus'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to rivers in Pennsylva ...

, '' Somatogyrus pennsylvanicus'' * Tallapoosa pebblesnail, '' Somatogyrus pilsbryanus'' *

Compact pebblesnail The compact pebblesnail (''Somatogyrus pumilus'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to rivers in Alabama ( ...

, ''

Somatogyrus pumilus The compact pebblesnail (''Somatogyrus pumilus'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to rivers in Alabama (We ...

'' *

Pygmy pebblesnail The pygmy pebblesnail, scientific name ''Somatogyrus pygmaeus'', is a species of very small or minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabam ...

, ''

Somatogyrus pygmaeus The pygmy pebblesnail, scientific name ''Somatogyrus pygmaeus'', is a species of very small or minute freshwater snail with a gill and an Operculum (gastropod), operculum, an aquatic gastropod mollusc in the family (biology), family Lithoglyphid ...

'' *

Quadrate pebblesnail The quadrate pebblesnail, scientific name ''Somatogyrus quadratus'', is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the U ...

, '' Somatogyrus quadratus'' *

Flint pebblesnail The Flint pebblesnail (''Somatogyrus rheophilas'') is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae. Distribution This species is endemic to the Flint River in Geor ...

, '' Somatogyrus rheophilas'' *

Elk pebblesnail The elk (''Cervus canadensis''), also known as the wapiti, is one of the largest species within the deer family, Cervidae, and one of the largest terrestrial mammals in its native range of North America and Central and East Asia. The commo ...

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Somatogyrus rosewateri ''Somatogyrus'' is a genus of very small freshwater and brackish water snails that have an operculum, aquatic gastropod micromolluscs in the family Lithoglyphidae. Species Species within the genus ''Somatogyrus'' include: * Reverse pebblesnai ...

'' *

Mud pebblesnail The mud pebblesnail, scientific name ''Somatogyrus sargenti'', is a species of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae. This species is endemic to the United States ...

, ''

Somatogyrus sargenti The mud pebblesnail, scientific name ''Somatogyrus sargenti'', is a species of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Hydrobiidae. This species is endemic to the United States ...

'' *

Rolling pebblesnail The rolling pebblesnail scientific name ''Somatogyrus strengi'', is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States. Its natural ...

, ''

Somatogyrus strengi The rolling pebblesnail scientific name ''Somatogyrus strengi'', is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States. Its natural ...

'' *

Choctaw pebblesnail The Choctaw (in the Choctaw language, Chahta) are a Native American people originally based in the Southeastern Woodlands, in what is now Alabama and Mississippi. Their Choctaw language is a Western Muskogean language. Today, Choctaw people are ...

, ''

Somatogyrus substriatus ''Somatogyrus'' is a genus of very small freshwater and brackish water snails that have an operculum, aquatic gastropod micromolluscs in the family Lithoglyphidae. Species Species within the genus ''Somatogyrus'' include: * Reverse pebblesna ...

'' *

Savannah pebblesnail The Savannah pebblesnail, scientific name ''Somatogyrus tenax'', is a species of freshwater snail, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States The United States of America (U.S.A. ...

, '' Somatogyrus tenax'' *

Opaque pebblesnail The opaque pebblesnail, scientific name ''Somatogyrus tennesseensis'', is a species of very small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United State ...

, ''

Somatogyrus tennesseensis The opaque pebblesnail, scientific name ''Somatogyrus tennesseensis'', is a species of very small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United State ...

'' * ''

Somatogyrus trothis ''Somatogyrus'' is a genus of very small freshwater and brackish water snails that have an Operculum (gastropod), operculum, aquatic animal, aquatic gastropod micromolluscs in the family Lithoglyphidae. Species Species within the genus ''Somatog ...

'' *

Coldwater pebblesnail Coldwater or Cold Water may refer to: Places In Canada: * Coldwater, Ontario * Coldwater First Nation, a Nlaka'pamux First Nations government in British Columbia ** Coldwater 1, also known as Coldwater Indian Reserve No. 1, the main reserve of ...

, ''

Somatogyrus tryoni ''Somatogyrus'' is a genus of very small freshwater and brackish water snails that have an operculum, aquatic gastropod micromolluscs in the family Lithoglyphidae. Species Species within the genus ''Somatogyrus'' include: * Reverse pebblesnai ...

'' *

Panhandle pebblesnail The Panhandle pebblesnail, scientific name ''Somatogyrus virginicus'', is a species of very small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United Stat ...

, ''

Somatogyrus virginicus The Panhandle pebblesnail, scientific name ''Somatogyrus virginicus'', is a species of very small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United Stat ...

'' *

Gulf Coast pebblesnail A gulf is a large inlet from the ocean into the landmass, typically with a narrower opening than a bay, but that is not observable in all geographic areas so named. The term gulf was traditionally used for large highly-indented navigable bodies ...

, ''

Somatogyrus walkerianus ''Somatogyrus'' is a genus of very small freshwater and brackish water snails that have an operculum, aquatic gastropod micromolluscs in the family Lithoglyphidae. Species Species within the genus ''Somatogyrus'' include: * Reverse pebblesnai ...

'' *

Channeled pebblesnail The channeled pebblesnail, scientific name ''Somatogyrus wheeleri'', was a species of very small freshwater and brackish water snails that have an operculum, aquatic gastropod mollusks in the family Lithoglyphidae. This species was endemic ...

, ''

Somatogyrus wheeleri The channeled pebblesnail, scientific name ''Somatogyrus wheeleri'', was a species of very small freshwater and brackish water snails that have an operculum, aquatic gastropod mollusks in the family Lithoglyphidae. This species was endemic ...

'' ;Species brought into synonymy: * ''Somatogyrus clenchi'', synonym of '' Aroapyrgus clenchi'' * ''Somatogyrus mexicanus'', synonym of '' Aroapyrgus mexicanus'' * ''Somatogyrus subglobosus'', synonym of ''

Birgella ''Birgella'' is a genus of gastropods belonging to the family Hydrobiidae. The species of this genus are found in Northern America. Species: *''Birgella burchi'' *''Birgella subglobosa'' (synonym: ''Birgella subglobosus ''Birgella'' is a ...

subglobosa'' * ''Somatogyrus umbilicatus'', synonym of ''

Clappia umbilicata ''Clappia umbilicata'', the umbilicate pebblesnail, was a species of small freshwater snail that had an operculum, an aquatic gastropod mollusk in the family Lithoglyphidae.Thompson F. G. (1984). "North American freshwater snail genera of the ...

'' NB:

WoRMS Worms may refer to: *Worm, an invertebrate animal with a tube-like body and no limbs Places *Worms, Germany, a city ** Worms (electoral district) * Worms, Nebraska, U.S. *Worms im Veltlintal, the German name for Bormio, Italy Arts and entertai ...

considers one more species than ITIS. It is marked (W) in the list above.

References

Lithoglyphidae Taxonomy articles created by Polbot {{Lithoglyphidae-stub