Orconectes inermis, the Northern cave crayfish, is a troglomorphic freshwater crayfish native to Kentucky and Indiana in the United States. There are two sub-species described; Orconectes inermis inermis, known as ghost grayfish Orconectes inermis testii (Hay, 1891), known as unarmed crayfish The two sub-species are known to form intergrades in the range where they overlap. References Further reading Cambaridae Cave crayfish Freshwater crustaceans of North America Crustaceans described in 1872 Taxa named by Edward Drinker Cope