St. Francis River Crayfish
This medium-small crayfish is brown, with blackish blotches and specks on the dorsal surface of the pincers and body (specks most numerous on abdomen). The pincers are often trimmed with red, and thickly set hairs (setae) are present in the gap at the base of the fingers. The only other small brown native crayfish within the general range of this species is the Big Creek crayfish. The two species cannot be separated with confidence without comparing the male reproductive structures (short and blunt in the St. Francis River crayfish; long and slender in the Big Creek crayfish). The two species are rarely found in the same stream.