Key to adult females of the species of the genus Gorgonolaureus

1 a Single dorsal horn on second thoracomere.................................................................. 2

1 b Two or three dorsal horns on thoracomeres 1–3.............................................................. 6

2 a Dorsal horn with long setae............................................................. G. bikiniensis Utinomi

2 b Dorsal horn without long setae........................................................................... 3

3 a Coxae of thoracopods II–V with 2–4 seminal receptacles, proximal sensory process directly behind claw guard........... 4

3 b Coxae of thoracopods II–V with more than 5–20 seminal receptacles, proximal sensory process distinctly separated from claw guard............................................................................................... 5

4 a Coxa of thoracopod V with 2 seminal receptacles, free ends of maxillae bent, tips bifid, harpoon-shaped..................................................................................................... G. decurvatus Grygier

4 b Coxa of thoracopod V with 4 seminal receptacles, free ends of maxillae straight, tips trifid........... G. helenae Kolbasov

5 a Fifth antennular segment with 11–12 stout setae along anterior edge, thoracopods II–V with 10–20 seminal receptacles........................................................................................... G. muzikae Grygier

5 b Fifth antennular segment with 7 stout setae along anterior edge, thoracopods II–V with 5–9 seminal receptacles............................................................................................. G. vietnamianus Grygier

6 a Thoracomeres 1, 2 with long and thoracomere 3 with short dorsal horns, tips of maxillae trifid, not bent..................................................................................................... G. tricornutus Grygier

6 b Thoracomeres 2, 3 with 2 long dorsal horns, tips of maxillae bifid, harpoon-shaped................ G. bicornutus sp. nov.