Diagnosis. Head very large. Eyes when present composed of internal pigment masses served by 2–4 external cuticular lenses. Accessory flagellum absent. Gnathopods feeble. Article 4 of pereopods 3–4 elongate, article 6 much shorter than 4 and article 5 much shorter than 6, these pereopods glandular. Pereopods 5–6 alike but pereopod 7 of distinct structure, article 2 with distinct, usually broad posteroventral lobe, article 2 of pereopods 5– 6 rhomboid or diamond shaped and poorly lobed. Urosomites 2–3 coalesced. Uropod 3 biramous. Telson laminar (Barnard & Karaman, 1991).