Endangered and Threatened Wildlife and Plants; Endangered Species Status for Slenderclaw Crayfish and Designation of Critical Habitat

We, the U.S. Fish and Wildlife Service (Service), determine endangered species status under the Endangered Species Act of 1973, as amended (Act), for the slenderclaw crayfish (Cambarus cracens), a cryptic freshwater crustacean that is endemic to streams on Sand Mountain within the Tennessee River Basin in DeKalb and Marshall Counties, Alabama. This rule adds this species to the Federal List of Endangered and Threatened Wildlife. In addition, we designate approximately 78 river miles (126 river kilometers) in DeKalb and Marshall Counties, Alabama, as critical habitat for the species under the Act.