Pyrgulopsis archimedis

Pyrgulopsis archimedis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda; clade Hypsogastropoda; clade Littorinimorpha
Superfamily:	Rissooidea
Family:	Hydrobiidae
Genus:	Pyrgulopsis
Species:	P. archimedis
Binomial name
	Pyrgulopsis archimedis; (Berry, 1947)

Pyrgulopsis archimedis, commonly known as the archimedes pyrg, is a species of minute freshwater snails with an operculum, aquatic gastropod molluscs or micromolluscs in the family Hydrobiidae.

This species' natural habitat is rivers and lakes. It is endemic to the Upper Klamath Lake and the uppermost portion of the Link River near Algoma, Oregon, United States.^[1]

Description

P. archimedis is a small snail that has a height of 4–6 millimetres (0.16–0.24 in) and a conical shell. Its differentiated from other Pyrgulopsis in that its penial filament has a medium lobe and medium filament with the penial ornament consisting of a short, transverse penial gland, short, transverse terminal gland, and stalked ventral gland.^[1]

References

^ ^a ^b Hershler, Robert (1994). A Review of the North American Freshwater Snail Genus Pyrgulopsis (Hydrobiidae). Washington, DC: Smithsonian Institution Press.

This Hydrobiidae-related article is a stub. You can help Wikipedia by expanding it.

[review-1] Hershler, Robert (1994). A Review of the North American Freshwater Snail Genus Pyrgulopsis (Hydrobiidae). Washington, DC: Smithsonian Institution Press.

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