Trimma Jordan & Seale 1906

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