Great Basin Naturalist


Collections of crayfish by Wyoming Game and Fish Department biologists and University of Wyoming staff in 1985–1987 included five species: Pacifastacus gambelii, the only species found in the Snake River and Bear River drainages of western Wyoming; Orconectes neglectus neglectus, collected from one reservoir in the South Platte River drainage in southeastern Wyoming (its first reported occurrence in the state); O. immunis and O. virilis, widespread east of the Continental Divide and in the Green River drainage of southwestern Wyoming; and Cambarus Diogenes Diogenes, collected from a tributary of the North Platte River in eastern Wyoming.