''Polygyriscus'' 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 minute air-breathing

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

pulmonate Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includ ...

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

Polygyridae Polygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea. MolluscaBase eds. (2021). MolluscaBase. Polygyridae Pilsbry, 1895. Accessed through: World Register of Marine Species a ...

. This is a

monotypic genus In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

USFWS
''Polygyriscus virginianus'' Five-year Review.
January 2008. of

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 containing the single species ''Polygyriscus virginianus'', known commonly as the Virginia fringed mountain snail or the Virginia coil.''Polygyriscus virginianus''.
The Nature Conservancy. That species is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the State of

Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth ar ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. The Virginia coil was listed as federally

endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...

on 2 August 1978. U.S. Fish & Wildlife Service
"Species Profile: Virginia fringed mountain snail (''Polygyriscus virginianus'')"
U.S. Fish & Wildlife Service. Accessed 4 October 2011. This snail was described in 1947. It is very rare; the snail has only been seen on bluffs along the New River in

Pulaski County, Virginia Pulaski County is a county located in the southwestern part of the U.S. state of Virginia. As of the 2020 census, the population was 33,800. Its county seat is Pulaski. Pulaski County is part of the Blacksburg– Christiansburg, VA Metropolit ...

. Only four adult specimens have been observed since 1978, and no juveniles have been seen since 1971. The snail is, however, difficult to find because it is only 3/20 in. long and may burrow up to 6 feet into the soil.

References

External links

Polygyridae Natural history of Virginia Pulaski County, Virginia Monotypic mollusc genera Gastropods described in 1947 Taxonomy articles created by Polbot ESA endangered species {{Polygyridae-stub pt:Polygyriscus