| Pacifastacus | |
|---|---|
 | |
| Pacifastacus leniusculus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Pancrustacea |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| 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 8 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
- Pacifastacus okanaganensis – Okanogan crayfish
- Pacifastacus malheurensis – Misfortunate crayfish
