Trimma, Jordan & Seale, 1906

Chen, I-Shiung & Harefa, Tonisman, 2024, A new species of marine goby Trimma (Teleostei: Gobiidae) from Taiwan, Zootaxa 5550 (1), pp. 46-65 : 60-61

Diagnostic key to all nominal species of Trimma from Taiwan

1a. Predorsal midline scaleless.............................................................................. 2

1b. Predorsal midline with some scales or fully scaled........................................................... 4

2a. Lateral side of body with dark stripe............................................................ T. grammistes

2b. Lateral side of body without dark stripe.................................................................... 3

3a. P 17–19; TR 8–9; P base with three dark spots................................................ T. macrophthalmus

3b. P 16; TR 7; P base without dark spot............................................................... T. anaima

4a. P rays some branched.................................................................................. 5

4b. P rays unbranched..................................................................................... 9

5a. Interorbital with trench between and posterodorsal to the eyes.................................................. 6

5b. No trench or groove between and posterodorsal to the eyes............................................... T. milta

6a. Opercle with 1–3 cycloid scales.......................................................................... 7

6b. Scale on upper opercle absent........................................................................... 8

7a. Second spine of D1 elongated; P base with dark bar.................................................... T. naudei

7b. Second spine of D1 not elongated; P base without dark bar............................................ T. caesiura

8a. PreD 7–9; 5, 8–9 and 8–9 papillae in row c, b and d, respectively; spines of dorsal-fin with black spots surrounded reddish margin............................................................................... T. tigrinum sp. nov.

8b. PreD 2–6; 5, 5–6 and 5–6 papillae in row c, b and d, respectively; spines and rays with yellowish-orange spots.. T. okinawae

9a. Cheek with scale rows, P 14–15; large black-reddish blotch on C base............................ T. caudomaculatum

9b. Cheek without scale; P 17–19; no such blotch on C base.............................................. T. annosum