Pacifastacus

Pacifastacus
	Pacifastacus leniusculus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Crustacea
Class:	Malacostraca
Order:	Decapoda
Infraorder:	Astacidea
Family:	Astacidae
Genus:	Pacifastacus; Bott, 1950
Type species
	Astacus Klamathensis; Stimpson, 1857

Pacifastacus is a genus of crayfish native to western North America (USA and Canada), containing the following six species (DD = Data Deficient; CR = Critically Endangered; LC = Least Concern; EX = Extinct):[1][2]

Pacifastacus chenoderma (fossil: Miocene – Pliocene)
Pacifastacus connectens
Pacifastacus fortis – shasta crayfish
Pacifastacus gambelii
Pacifastacus leniusculus – signal crayfish
Pacifastacus nigrescens

References

James W. Fetzner, Jr. (January 14, 2008). "Genus Pacifastacus Bott, 1950". Crayfish Taxon Browser. Carnegie Museum of Natural History. Archived from the original on June 11, 2011. Retrieved May 26, 2010.
"Search". IUCN Red List. International Union for Conservation of Nature. Retrieved October 9, 2010.

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[1] James W. Fetzner, Jr. (January 14, 2008). "Genus Pacifastacus Bott, 1950". Crayfish Taxon Browser. Carnegie Museum of Natural History. Archived from the original on June 11, 2011. Retrieved May 26, 2010.

[2] "Search". IUCN Red List. International Union for Conservation of Nature. Retrieved October 9, 2010.