Cambarus callainus NatureServe Explorer Species Reports — NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
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The genus Cambarus is the second largest freshwater crayfish genus inhabiting the Northern Hemisphere, with only sixty fewer species than the genus Procambarus. Though Cambarus are varied across species, the two terminal elements that make up the male form I gonopod form ninety degree angles with the central appendage, allowing for their identification. Unlike the genus Procambarus whose first pleopod tends to have three processes at the tip, Cambarus has only one or two. Cambarus reach 17–26 mm carapace lengths in their first year, while average adult carapace length ranges from 55–62 mm.
As a genus containing nearly 100 species, Cambarus’s coloration is variable. Cambarus bartonii is dark brown, while species like Cambarus pauleyi range from subtle to vibrant blues and reds. Other species are light green or grayish in color.
|Status||Date Listed||Lead Region||Where Listed|
|Threatened||05/09/2016||Northeast Region (Region 5)||Wherever found|
|04/07/2016||81 FR 20449 20481||Threatened Species Status for the Big Sandy Crayfish and Endangered Species Status for the Guyandotte River Crayfish; Final Rule|
|12/15/2015||80 FR 77598 77599||Endangered Species Status for the Big Sandy Crayfish and the Guyandotte River Crayfish; Proposed rule; reopening of comment period|
|04/07/2015||80 FR 18709 18739||Endangered Species Status for the Big Sandy Crayfish and the Guyandotte River Crayfish; Proposed rule; 12-month finding and status review|
|09/27/2011||76 FR 59836 59862||Partial 90-Day Finding on a Petition To List 404 Species in the Southeastern United States as Endangered or Threatened With Critical Habitat|
|11/15/1994||59 FR 58982 59028||ETWP; Animal Candidate Review for Listing as Endangered or Threatened Species.|
|11/21/1991||56 FR 58804 58836||ETWP; Animal Candidate Review for Listing as Endangered or Threatened Species; 56 FR 58804 58836|