The angular pebblesnail,

scientific name In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

''Somatogyrus biangulatus'', is a species of very small

freshwater snail Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs ...

with an operculum, an aquatic operculate

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 in the Hydrobiidae family. This species is endemic to the United States. Its natural habitat is rivers. This snail is only located in specific freshwater cave environments and has not been extensively studied.

References

Molluscs of the United States Somatogyrus Gastropods described in 1906 Taxonomy articles created by Polbot {{Hydrobiidae-stub