Pacifastacus

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

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

References