''Trilobopsis'' 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 small, 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 molluscs, terrestrial gastropod mollusks that have gastropod shell, shel ...

terrestrial Terrestrial refers to things related to land or the planet Earth, as opposed to extraterrestrial. 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 o ...

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 inclu ...

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

Polygyridae Polygyridae is a family (biology), family of air-breathing land snails, terrestrial molluscs, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.MolluscaBase eds. (2021). MolluscaBase. Polygyridae Pilsbry, 1895. Accessed thro ...

Distribution

The distribution of this species is restricted to

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

and

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

, USA.

Description

The shells of species in this genus are somewhat globular and about 5 to 8 mm in diameter (1/4 to 3/16 inch). Snails in this genus are distinguished from related snails on the basis of their reproductive anatomy.Pilsbry, Henry A. 1940. ''Land Mollusca of North America (North of Mexico)''. Acad. Nat. Sci. Philadelphia, Monograph 3, vol. 1(2): 778-789.

Species

Species in the genus ''Trilobopsis'' include:
''Trilobopsis'' at ''ITIS'' (''Integrated Taxonomic Information System''); accessed 13 Jan. 2008. *'' Trilobopsis loricata'' (Gould, 1846) **'' Trilobopsis loricata lowei'' (Pilsbry, 1925) **'' Trilobopsis loricata mariposa'' Pilsbry, 1940 **'' Trilobopsis loricata nortensis'' (Berry, 1933) **'' Trilobopsis loricata perforata'' Pilsbry, 1940 **'' Trilobopsis loricata sonomaensis'' (Hemphill, 1911) *'' Trilobopsis penitens'' (Hanna & Rixford, 1923) *'' Trilobopsis roperi'' (Pilsbry, 1889) *'' Trilobopsis tehamana'' (Pilsbry, 1928) *'' Trilobopsis trachypepla'' (Berry, 1933)

References

Polygyridae {{Polygyridae-stub