Grand Wash springsnail

Grand Wash springsnail
Conservation status
	; Vulnerable (IUCN 2.3)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda; clade Hypsogastropoda; clade Littorinimorpha
Superfamily:	Rissooidea
Family:	Hydrobiidae
Genus:	Pyrgulopsis
Species:	P. bacchus
Binomial name
	Pyrgulopsis bacchus; Hershler, 1988

The Grand Wash springsnail (Pyrgulopsis bacchus) is a species of freshwater snail in the family Hydrobiidae, the mud snails. It is endemic to Mohave County, Arizona, in the United States.[2]

The snail is known only from Grand Wash, a watershed near Lake Mead.[2] Shells that may belong to this species have also been collected in southern Nevada.[3] The snail occurs in a few springs in its range, where it feeds on algae and detritus. Though very limited in distribution, it can be abundant in its native springs, with up to 50 individuals congregating on a single leaf in the water.[3]

Description

P. bacchus is a small snail that has a height of 2.3–3.1 millimetres (0.091–0.122 in) and an ovate-conic, medium-sized shell. Its differentiated from other Pyrgulopsis in that its penial filament has a short lobe and medium length filament with the penial ornament consisting of a transverse, often fragmented terminal gland.[4]

gollark: The touchscreen won't respond to input, so it's basically useless.

gollark: Something like that?

gollark: I think.

gollark: No, it's been 2 years or so.

gollark: They get them on monthly plans, I generally (have my parents) buy phones, then have to replace them every 1.5-2 years when they randomly fail in some way, probably because I horribly mistreat them?

References

Mollusc Specialist Group 2000. Pyrgulopsis bacchus. The IUCN Red List of Threatened Species. Version 2014.2. Downloaded on 11 September 2014.
NatureServe. 2014. Pyrgulopsis bacchus. NatureServe Explorer. Version 7.1. Accessed September 11, 2014.
Pyrgulopsis bacchus. Invertebrate Abstracts. Arizona Game and Fish Department.
Hershler, Robert (1994). A Review of the North American Freshwater Snail Genus Pyrgulopsis (Hydrobiidae). Washington, DC: Smithsonian Institution Press.

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[1] Mollusc Specialist Group 2000. Pyrgulopsis bacchus. The IUCN Red List of Threatened Species. Version 2014.2. Downloaded on 11 September 2014.

[ns-2] NatureServe. 2014. Pyrgulopsis bacchus. NatureServe Explorer. Version 7.1. Accessed September 11, 2014.

[az-3] Pyrgulopsis bacchus. Invertebrate Abstracts. Arizona Game and Fish Department.

[review-4] Hershler, Robert (1994). A Review of the North American Freshwater Snail Genus Pyrgulopsis (Hydrobiidae). Washington, DC: Smithsonian Institution Press.