Wet rock physa

Wet rock physa
Conservation status
	; Vulnerable (IUCN 2.3)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia; clade Euthyneura; clade Panpulmonata; clade Hygrophila
Superfamily:	Planorboidea
Family:	Physidae
Subfamily:	Physinae
Tribe:	Physellini
Genus:	Physella
Species:	P. zionis
Binomial name
	Physella zionis; Pilsbry, 1926

The Wet rock physa, scientific name Physella zionis, is a species of freshwater snail, an aquatic pulmonate gastropod mollusc in the family Physidae, the bladder snails. This species is endemic to two connected canyons, Zion Canyon and Orderville Canyon, along the north fork of the Virgin River in Zion National Park, Washington County, Utah, a stretch of about 5 kilometers (3.1 mi) (Oliver & Bosworth 1999).

References

^ Bogan A. E. (1996). Physella zionis. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.

Oliver, G. V. and Bosworth, W. R. III. (1999). Rare, Imperiled, and Recently Extinct or Extirpated Mollusks of Utah: A Literature Review. Utah Division of Wildlife Resources. Publication Number 99-29.

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[1] Bogan A. E. (1996). Physella zionis. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.

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