''Pomatiopsis lapidaria'' is an amphibious

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of snail 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, a

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 ...

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 lapidaria'' is the

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen ...

of the genus ''Pomatiopsis''.

Distribution

The distribution of ''Pomatiopsis lapidaria'' includes the USA. The type locality was not recorded.

Ecology

''Pomatiopsis lapidaria'' is amphibious: it lives in damp or wet habitats on marshy ground and in soil that is periodically flooded.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
Dundee (1957) described the life history and the anatomy of ''Pomatiopsis lapidaria'' in detail.Dundee D. S. (1957). "Aspects of the biology of ''Pomatiopsis lapidaria'' (Say) (Mollusca: Gastropoda: Prosobranchia)". ''Miscellaneous Publications'' 100: 65 pp., 14 plates, 1 figure, 2 maps, 8 tables
PDF

References

External links

* Walker B. (1918). "A synopsis of the classification of the freshwater Mollusca of North America, north of Mexico, and a catalogue of the more recently described species, with notes". ''Miscellaneous Publications'' 6: 214 pp., 1 plate, 233 figures
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Pomatiopsidae">age 34">[page 34
Pomatiopsidae Gastropods described in 1817 {{Pomatiopsidae-stub