''Somatogyrus'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

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. The term excludes seawater and brackish water, but it does include non-salty mi ...

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 estuary ...

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

s that have an operculum,

aquatic Aquatic means relating to water; living in or near water or taking place in water; does not include groundwater, as "aquatic" implies an environment where plants and animals live. Aquatic(s) may also refer to: * Aquatic animal, either vertebrate ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

micromollusc A micromollusc is a shelled mollusc which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine molluscs, although in addition, numerous species of land snails and freshwater molluscs 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, '' Somatogyrus alcoviensis'' * ''

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 pebblesnail ...

'' (W) *

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

, '' Somatogyrus amnicoloides'' * Golden pebblesnail, ''

Somatogyrus aureus ''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 ...

'' *

Angular pebblesnail The angular pebblesnail, scientific name ''Somatogyrus biangulatus'', is a species of very small freshwater snail with an operculum, an aquatic operculate gastropod mollusc in the Lithoglyphidae family. This species is endemic to Alabama in th ...

, '' 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 States ...

, ''

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 States ...

'' *

Coosa pebblesnail The Coosa pebblesnail, scientific name ''Somatogyrus coosaensis'', is a species of small freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Lithoglyphidae. This species is endemic to Alabama in the United S ...

, '' Somatogyrus coosaensis'' * Thick-lipped pebblesnail, '' Somatogyrus crassilabris'' *

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. Its n ...

, '' Somatogyrus crassus'' *

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 Rive ...

, ''

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 Rive ...

'' *

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

, ''

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

'' *

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. Distribution This species is endemic to the Mississippi River, M ...

, '' Somatogyrus depressus'' * Ovate pebblesnail, '' Somatogyrus excavatus'' * Cherokee pebblesnail, '' Somatogyrus georgianus'' * Fluted pebblesnail, '' Somatogyrus hendersoni'' * Granite pebblesnail, ''

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

Somatogyrus tenax 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 (USA), also ...

'' * Opaque pebblesnail, '' Somatogyrus tennesseensis'' * '' Somatogyrus trothis'' * Coldwater pebblesnail, '' Somatogyrus tryoni'' * Panhandle pebblesnail, ''

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 States ...

'' * Gulf Coast pebblesnail, '' Somatogyrus walkerianus '' * Channeled pebblesnail, '' Somatogyrus wheeleri'' ;Species brought into synonymy: * ''Somatogyrus clenchi'', synonym of '' Aroapyrgus clenchi'' * ''Somatogyrus mexicanus'', synonym of '' Aroapyrgus mexicanus'' * ''Somatogyrus subglobosus'', synonym of '' Birgella subglobosa'' * ''Somatogyrus umbilicatus'', synonym of '' Clappia umbilicata'' NB:

WoRMS The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...

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

References

Lithoglyphidae Taxonomy articles created by Polbot {{Lithoglyphidae-stub