Cambarus (Cambarus) davidi, a new species of crayfish (Decapoda: Cambaridae) from North Carolina

Cambarus (Cambarus) davidi is a new species of crayfish from the eastern Piedmont Plateau of North Carolina, where it is restricted to intermittent streams, seepage areas, springs, and burrows. Although the ranges of the two species appear to be broadly disjunct, C. (C.) davidi is most closely related to the ecologically more tolerant Cambarus (C.) bartonii (s.l.), and especially resembles some members of the controversial subspecies C. (C.) b. cavatus. Cambarus (C.) davidi is distinguished by a suite of characters that includes a vaulted carapace; a deeply excavate, ladlelike rostrum; a very narrow, sparsely punctate areola; and an obtuse to nearly obsolete suborbital angle that almost always bears a small tubercle.