1. Pigmented eyes present; pleon segments 1–3 without posterodorsal teeth; palmar margin of propodus of pereopod 1 (gnathopod 1) vertical, much longer than posterior margin............................. Sextonia longirostris Chevreux, 1920
- Pigmented eyes absent; pleon segments 2–3 with 10–12 posterodorsal teeth; palmar margin of propodus of pereopod 1 (gnathopod 1) oblique, as long as posterior margin........................................... Sextonia caecus sp. nov.