Cambarus (Jugicambarus} tuckasegee., a new species of crayfish (Decapoda: Cambaridae) from the Little Tennessee River basin,North Carolina

摘要

Cambarus (Jugicambarus) tuckasegee is a new species of stream-dwelling crayfish that appears to be endemic to part of the Tuckasegee River subdrainage of the Little Tennessee River basin in the Blue Ridge province of North Carolina, where currently it is known from Soco Creek, Raven Fork, and the Oconaluftee River. It seems to share strong affinities only with Cambarus (/.) distans, which occurs in Kentucky, Tennessee, Alabama, and ostensibly in northwestern Georgia. It is readily distinguishable from this and all other members of the subgenus Jugicambarus by a combination of characters that includes: a short central projection with a deep subapical notch, and a long, caudoproximally directed mesial process, both on the gonopod of the form I male; a very inflated palm and notably short, stout fingers, all lacking tufts of long, stiff setae; a broad, densely punctate areola; a rostrum with very thickened, sometimes cephalically produced margins; and five to seven tubercles or spines on the ventral surface of the carpus.