''Pomatiopsis'' 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 amphibious

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 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 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 ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

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 b ...

. ''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 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 United States, contig ...

Midwestern United States The Midwestern United States (also referred to as the Midwest, the Heartland or the American Midwest) is one of the four census regions defined by the United States Census Bureau. It occupies the northern central part of the United States. It ...

and

Eastern United States The Eastern United States, often abbreviated as simply the East, is a macroregion of the United States located to the east of the Mississippi River. It includes 17–26 states and Washington, D.C., the national capital. As of 2011, the Eastern ...

.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 natur ...

'', 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'' Tryon, 1863 * '' Pomatiopsis californica'' Pilsbry, 1899 * '' Pomatiopsis chacei'' Pilsbry, 1937 * '' Pomatiopsis cincinnatiensis'' (Lea, 1840) * '' Pomatiopsis hinkleyi'' Pilsbry, 1896 * '' Pomatiopsis lapidaria'' (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

External links

* {{Authority control Pomatiopsidae