Orconectes inermis testii, known as the unarmed crayfish, is one of two subspecies of the Northern cave crayfish (Orconectes inermis), along with Orconectes inermis inermis. Distribution It is endemic to Monroe County, Indiana in the United States, where it interbreeds to form intergrades with O. i. inermis. References Subspecies Cambaridae Cave crayfish Crustaceans described in 1891 Endemic fauna of Indiana Freshwater crustaceans of North America