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Apr 19, 2012

Pacifastacus gambelii

Pigmented, eyes normal; rostrum with margins converging, at least 3 pr lateral marginal spines, acumen indistinct, median carina present; postorbital ridges lacking posterior spines or tubercles; cervical and hepatic spines absent; areola broad with 7-9 punctations in narrowest part, branchiocardiac groove interrupted so that distinct cephalic and caudal portions of areola evident; chela stout, ...
Apr 19, 2012

Orconectes virilis

50% of total length of pleopod, central projection longer and with distal third smoothly curved so that apex directed caudally, lacking shoulder on cephalic margin of pleopod (Hobbs, 1976). [LENGTH: to 70 TCL; to 150 TL] [WIDTH: to 30]
Apr 19, 2012

Procambarus clarkii

4th pereiopods; male first pleopod terminating in 4 elements, cephalic process strongly lobate and with sharp angle on caudodistal margin, lacking subapical setae, with strong angular shoulder on cephalic margin quite proximal to terminal elements, that of right pleopod wrapped around margin to appear reduced or absent (Hobbs, 1976). [LENGTH: to 60 TCL; to 125 TL] [WIDTH: to 25 mm]