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Moapa pebblesnail
Species of gastropod From Wikipedia, the free encyclopedia
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The Moapa pebblesnail also known as the Muddy Valley turban snail, scientific name Pyrgulopsis avernalis, is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae.
The natural habitat of this species is springs,[2] and it is currently threatened by habitat loss. This species is endemic to the Moapa Valley, Nevada, United States[2] and the common name refers to the Moapa River in Nevada.
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Description
Pyrgulopsis avernalis is a small snail that has a height of 2.4–4.3 millimetres (0.094–0.169 in) and ovate conical shell. Its differentiated from other Pyrgulopsis in that its penial filament has a small lobe and large filament with the penial ornament consisting of a small terminal gland, a gland along the outer edge of the penial lobe and a ventral gland.[2]
Genus transfer
When originally described in 1935, it was assigned to the genus Fluminicola. In 1994, it was transferred to the genus Pyrgulopsis.[2]
References
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