Pacifastacus nigrescens -

IUCN Status: Critically Endangered
IUCN Species Profile

Key To Pacifastacus: 13b):...Pacifastacus nigrescens (Stimpson, 1857). ...
http://crayfish.byu.edu/species_list.htm

List of Crayfish Species: ...- ... Pacifastacus fortis. Pacifastacus gambelii. Pacifastacus nigrescens (possibly extinct). Subgenus Pacifastacus, Pacifastacus leniusculus klamathensis. ...
http://nas.er.usgs.gov/queries/specimenviewer.asp?SpecimenID=4750

NAS database: ...pages, 106. Comments, Native to Oregon and Washington. This crayfish may have contributed to the extinction of the native sooty crayfish, Pacifastacus nigrescens. ...
http://www.natureserve.org/getData/dataSets/animalDataSets/crayus.htm

FAMILY: ...- ... CRAYFISH, G5, ICMAL31040, DECAPODA, ASTACIDAE, PACIFASTACUS NIGRESCENS, (Stimpson, 1857), SOOTY CRAYFISH, GX, ICMAL31050, DECAPODA, CAMBARIDAE, ...
http://www.natureserve.org/getData/dataSets/animalDataSets/crayus.txt

[an error occurred while processing this directive] Pacifastacus nigrescens [an error occurred while processing this directive] 15867

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