Diagnosis. Head with eye lobes produced forward; antenna 1 with accessory flagellum absent; coxae long, weakly overlapping; gnathopods subchelate, gnathopod 2 slightly to greatly larger than gnathopod 1; pereopod 5 with large robust seta on palm and accessory spine on dactylus; uropod 3 peduncle long, equal to or longer than outer ramus, inner ramus reduced to vestigial.