Range and Variations of Subspecies of Cambarus longulus (Decapoda: Astacidae)

As a result of the loss of the type specimens and confusion arising from an erroneous restriction of the type locality of the typical subspecies, the crayfish Cambarus longulus Girard, 1852, has been poorly understood; furthermore, the ranges of its two previously described subspecies have never been clearly delineated.This report is based on a restudy of much of the material seen by previous authors and of representatives of all the collections of C. longulus in the U.S.