Genus Ericthonius H. Milne Edwards, 1830

Diagnosis.

Body subcylindrical. Antennae 1 and 2 peduncular articles 1–3 not broadly expanded, similar in width; antenna 1 accessory flagellum minute. Male coxa 2 distinctly separate from coxa 3; longer than wide in hyperadults. Gnathopod 1 subchelate, smaller than gnathopod 2. Male gnathopod 2 carpochelate. Pereopod 5 not geniculate. Pleopods 1–3 outer ramus thin; pleopods 2–3 rami not reduced, subequal. Uropod 2 bi-ramous. Uropod 3 uniramous, ramus with distal hook. Telson entire with dorsal recurved spines.