Oklahoma cave crayfish

Cambarus tartarus

Cambarus tartarus, the Oklahoma cave crayfish, is a critically endangered freshwater crayfish found in only 3 cave systems in Delaware County, Oklahoma.
Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassMalacostraca
OrderDecapoda
FamilyCambaridae
GenusCambarus
SpeciesCambarus tartarus