Image: Pacifastacus nigrescens

Description: Astacus nigrescens fortis Faxon. Male. Type. Fall R., Fall City Mills Cal., Aug 29, 1898 Subject: Astacus, Crayfish Tag: Shellfish
Title: Pacifastacus nigrescens
Credit: Faxon, Walter (1914) Notes on the Crayfishes in the United States National Museum and the Museum of Comparative Zoology with Descriptions of New Species and Subspecies to Which is Appended a Catalogue of the Known Species and Subspecies, Memoirs of the Museum of Comparative Zoology at Harvard College, Vol.XL, No.8, Cambridge, MA: Museum of Comparative Zoology
Author: George Nelson
Permission: Public domainPublic domainfalsefalse This is a photograph from the Freshwater and Marine Image Bank at the University of Washington. Materials in the Freshwater and Marine Image Bank are in the public domain. No copyright permissions are needed. Acknowledgement of the Freshwater and Marine Image Bank as a source for borrowed images is requested.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No