Grandidierella, Coutiere, 1904

Ariyama, Hiroyuki, 2020, Six species of Grandidierella collected from the Ryukyu Archipelago in Japan with descriptions of four new species (Crustacea: Amphipoda: Aoridae), Zootaxa 4810 (1), pp. 1-44 : 41

Key to Grandidierella species in the Ryukyu Archipelago (adult males).

1. Merus of gnathopod 2 divergent posteriorly............................................... G. gilesi Chilton, 1921

- Merus of gnathopod 2 not divergent....................................................................... 2

2. Carpus of gnathopod 1 with stridulating ridges............................................ G. japonicoides sp. nov.

- Carpus of gnathopod 1 lacking stridulating ridges............................................................ 3

3. Merus of gnathopod 1 with posterodistal projection, carpus of gnathopod 1 with 3 teeth............................. 4

- Merus of gnathopod 1 without posterodistal projection, carpus of gnathopod 1 with 2 teeth........................... 5

4. Proximal tooth on gnathopod 1 carpus very close to middle tooth, uropod 1 peduncle with inter-ramal process................................................................................................. G. contigua sp. nov.

- Proximal tooth on gnathopod 1 carpus apart from middle tooth, uropod 1 peduncle lacking inter-ramal process......................................................................................... G. pseudosakaensis sp. nov.

5. Carpus of gnathopod 1 narrow (length ca. 1.6 times of width), coxa 2 with posteromedial projection......................................................................... G. halophila Wongkamhaeng, Pholpunthin & Azman, 2012

- Carpus of gnathopod 1 wide (length ca. 1.2 times of width), coxa 2 without posteromedial projection....... G. nana sp. nov.