''Pomatiopsis'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of amphibious

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 Gastro ...

s with

gills A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are ...

and an operculum, aquatic freshwater

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s in the family

Pomatiopsidae Pomatiopsidae is a family of small, mainly freshwater snails, (some also occur in other habitats) that have gills and an operculum, aquatic gastropod mollusks in the superfamily Truncatelloidea (according to the taxonomy of the Gastropoda by ...

. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae.

Distribution

The distribution of the genus ''Pomatiopsis'' includes the USA:

West Coast of the United States The West Coast of the United States, also known as the Pacific Coast, Pacific states, and the western seaboard, is the coastline along which the Western United States meets the North Pacific Ocean. The term typically refers to the contiguous U.S ...

Midwestern United States The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four census regions of the United States Census Bureau (also known as "Region 2"). It occupies the northern central part of the United States. I ...

and

Eastern United States The Eastern United States, commonly referred to as the American East, Eastern America, or simply the East, is the region of the United States to the east of the Mississippi River. In some cases the term may refer to a smaller area or the East C ...

.Davis G. M. (1979). "The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong river Triculinae". ''

Academy of natural Sciences of Philadelphia The Academy of Natural Sciences of Drexel University, formerly the Academy of Natural Sciences of Philadelphia, is the oldest natural science research institution and museum in the Americas. It was founded in 1812, by many of the leading natura ...

'', Monograph 20: 1-120.
at Google Books

Description

In 1862, the American malacologist

George Washington Tryon George Washington Tryon Jr. (20 May 1838 – 5 February 1888) was an American malacologist who worked at the Academy of Natural Sciences in Philadelphia. Biography George Washington Tryon was the son of Edward K. Tryon and Adeline Savidt. ...

first defined this genus. Tryon's diagnosis reads as follows:

Species

There are four species within the genus ''Pomatiopsis'': * ''

Pomatiopsis binneyi ''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of th ...

'' Tryon, 1863 * ''

Pomatiopsis californica ''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of th ...

'' Pilsbry, 1899 * ''

Pomatiopsis chacei ''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of th ...

'' Pilsbry, 1937 * ''

Pomatiopsis cincinnatiensis ''Pomatiopsis'' is a genus of amphibious snails with gills and an operculum, aquatic freshwater gastropod mollusks in the family Pomatiopsidae. ''Pomatiopsis'' is the type genus of the family Pomatiopsidae. Distribution The distribution of th ...

'' (Lea, 1840) * ''

Pomatiopsis hinkleyi ''Pomatiopsis lapidaria'' is an amphibious species of snail with gills and an operculum, a gastropod mollusk in the family Pomatiopsidae. ''Pomatiopsis lapidaria'' is the type species of the genus ''Pomatiopsis''. Distribution The distributio ...

'' Pilsbry, 1896 * ''

Pomatiopsis lapidaria ''Pomatiopsis lapidaria'' is an amphibious species of snail with gills and an operculum, a gastropod mollusk in the family Pomatiopsidae. ''Pomatiopsis lapidaria'' is the type species of the genus ''Pomatiopsis''. Distribution The distributio ...

'' (Say, 1817) - type species

Ecology

Species in the genus ''Pomatiopsis'' are amphibious, living in humid habitats, on marshy ground and in periodically flooded soil (''Pomatiopsis californica'' and ''Pomatiopsis lapidaria''), in trickling water (''Pomatiopsis binneyi'') and on mud of streams (''Pomatiopsis cincinnatiensis'').

References

This article incorporates public domain text from the reference {{Taxonbar, from=Q3140286 Pomatiopsidae