Pacifastacus Explained

Pacifastacus is a genus of crayfish native to western North America (USA and Canada), containing six species, two of which are extinct:^[1]

• †Pacifastacus chenoderma (fossil: Miocene – Pliocene)
• Pacifastacus connectens
• Pacifastacus fortis – Shasta crayfish
• Pacifastacus gambelii
• Pacifastacus leniusculus – signal crayfish
• †Pacifastacus nigrescens – Sooty crayfish

Notes and References

1. Web site: James W. Fetzner Jr. . January 14, 2008 . Genus Pacifastacus Bott, 1950 . Crayfish Taxon Browser . . May 26, 2010 . https://web.archive.org/web/20110611172041/http://iz.carnegiemnh.org/crayfish/NewAstacidea/genus.asp?g=Pacifastacus . June 11, 2011.