1	Body in dorsal aspect with marked constriction between pronotum and elytron (e.g. Figs 20a, 87a)	2
1'	Body subovate, in dorsal aspect with weak constriction between pronotum and elytron (e.g. Figs 2a, 27a)	20
2 (1)	Length 1.44–2.20 mm. Pronotum in basal half with pair of sublateral impressions. Coloration of body dark ferruginous to black	3
2'	Length 2.20–4.04 mm. Pronotum without pair of distinct impressions. Coloration of body partly ferruginous, coppery, bronze, or black	11
3 (2)	Flagelliform transfer apparatus (Fig. 47b) subequal to body of penis. Lombok	Trigonopterus lombokensis Riedel, sp. n.
3'	Flagelliform transfer apparatus (Figs 33b, 54b, 56b, 57b, 60b, 61b, 66b, 87b) longer than body of penis	4
4 (3')	Penis (Figs 61b, 87b) subapically with sides angularly projecting, abruptly converging to slightly extended apex. Sumbawa	5
4'	Penis with weakly subangulate or rounded apex never extended medially	6
5 (4)	Flagelliform transfer apparatus (Fig. 87b) 2.9 × longer than body of penis	Trigonopterus sumbawensis Riedel, sp. n.
5'	Flagelliform transfer apparatus (Fig. 61b) 2.3–2.4 × longer than body of penis	Trigonopterus pseudosumbawensis Riedel, sp. n.
6 (4')	Flagelliform transfer apparatus (Fig. 66b) relatively thick, 2.6 × as long as body of penis; endophallus with sclerite. Flores	Trigonopterus roensis Riedel, sp. n.
6'	Flagelliform transfer apparatus (Figs 33b, 54b, 56b, 57b, 60b) thin, 3–6 × as long as body of penis; endophallus without sclerite	7
7 (6')	Flagelliform transfer apparatus ca. 3.0–3.3 × longer than body of penis; apodemes 2.4–2.5 × as long as body of penis. Sumbawa	8
7'	Flagelliform transfer apparatus ca. 4.0–7.0 × longer than body of penis; apodemes 3.2–4.1 × as long as body of penis. Flores	9
8 (7)	Penis (Fig. 56b) in apical third distinctly widening and rounded to weakly subangulate apex	Trigonopterus parasumbawensis Riedel, sp. n.
8'	Penis (Fig. 57b) with sides parallel before rounded apex	Trigonopterus pauxillus Riedel, sp. n.
9 (7')	Penis (Fig. 54b); flagelliform transfer apparatus 6.0–6.9 × as long as body	Trigonopterus paraflorensis Riedel, sp. n.
9'	Penis (Figs 33b, 60b); flagelliform transfer apparatus 3.9–4.6 × as long as body	10
10 (9')	Elytra more compact (Fig. 33a). Penis (Fig. 33b); flagelliform transfer apparatus 3.9–4.0 × as long as body. Medium elevations of the Mt. Ranaka / Lake Ranamese area	Trigonopterus florensis Riedel, sp. n.
10'	Elytra more slender (Fig. 60a). Penis (Fig. 60b); flagelliform transfer apparatus 4.1–4.6 × as long as body. Summit area of Mt. Ranaka	Trigonopterus pseudoflorensis Riedel, sp. n.
11 (2')	Profemur with large subacute tooth. Color of elytra black, usually basal third ferruginous	Trigonopterus dentipes Riedel, sp. n.
11'	Profemur with blunt tooth or simple	12
12 (11')	Color of elytra with bright metallic lustre, coppery	13
12'	Color of elytra black, sometimes basally ferruginous; at most with bronze lustre, never bright metallic	17
13 (12)	Onychium minute, drop-shaped, with median spine instead of pair of claws; weakly projecting beyond margin of tarsomere 3	Trigonopterus syarbis Riedel, sp. n.
13'	Onychium distinctly projecting beyond margin of tarsomere 3, apically with pair of claws	14
14 (13')	Elytra with humeri markedly swollen, laterally markedly projecting (Figs 35a, 50a)	15
14'	Elytra with humeri simple (Fig. 19a) or weakly swollen (Fig. 20a), not markedly projecting	16
15 (14)	Elytra (Fig. 35a) with interval 4 subbasally swollen, forming dorsal protrusion; sutural interval simple	Trigonopterus fulgidus Riedel, sp. n.
15'	Elytra (Fig. 50a) with sutural interval in basal half distinctly swollen; interval 4 without dorsal protrusion	Trigonopterus micans Riedel, sp. n.
16 (14')	Elytra (Fig. 20a) with interval 5 and 6 behind middle swollen, gently projecting from lateral outline. Penis (Fig. 20b) apically subtruncate, weakly rounded, subglabrous	Trigonopterus cupreus Riedel, sp. n.
16'	Elytra (Fig. 19a) with interval 5 and 6 simple. Penis (Fig. 19b) apically rounded, with fringe of conglutinate flattened setae, interrupted by glabrous median notch	Trigonopterus cuprescens Riedel, sp. n.
17 (12')	Body (Fig. 79a) subovate, slender. Meso- and metafemur anteroventrally with row of large sharp teeth	Trigonopterus serratifemur Riedel, sp. n.
17'	Body (Figs 21a, 72a, 84a) wider. Meso- and metafemur anteroventrally with single tooth	18
18 (17')	Elytra (Fig. 84a) completely black with slight bronze lustre; interval 5 forming dorsal tubercle; interval 6 behind middle swollen, gently projecting from lateral outline	Trigonopterus sinuatus Riedel, sp. n.
18'	Elytra basally ferruginous; intervals 5 and 6 simple	19
19 (18')	Elytral interval 5 in front of middle swollen, dorsally projecting. Penis (Fig. 21b)	Trigonopterus dacrycarpi Riedel, sp. n.
19'	Elytral interval 5 simple. Penis (Fig. 72b)	Trigonopterus sasak Riedel, sp. n.
20 (1')	species from Lombok	21
20'	species from Sumbawa	23
20'	species from Flores	27
21 (20)	Elytral intervals flat, subglabrous. Pronotum longitudinally rugose	Trigonopterus disruptus Riedel, sp. n.
21'	Elytral intervals costate. Pronotum coarsely punctate	22
22 (21')	Elytra black except sutural interval ferruginous; intervals 3 and 5 more distinctly swollen, with row of punctures	Trigonopterus rinjaniensis Riedel, sp. n.
22'	Elytra with bronze lustre; intervals 3 and 5 as other intervals, subglabrous	Trigonopterus aeneomicans Riedel, sp. n.
23 (20')	Elytra with intervals flat, striae marked by regular rows of punctures	Trigonopterus punctatoseriatus Riedel, sp. n.
23'	Elytra with striae deeply impressed, intervals costate	24
24 (23')	Elytra with bronze lustre	Trigonopterus aeneomicans Riedel, sp. n.
24'	Elytra largely black, without distinct metallic lustre	25
25 (24')	Sutural intervals of elytra costate, with row of punctures facing laterad. Abdominal ventrite 5 medially with shallow impression	Trigonopterus sembilan Riedel, sp. n.
25'	Sutural intervals of elytra forming pair of ridges, inner face with dense row of punctures. Abdominal ventrite 5 with median carina	26
26 (25')	Elytral interval 3 with dense row of punctures. Penis as in Fig. 70b, transfer apparatus with long median extension	Trigonopterus saltator Riedel, sp. n.
26'	Elytral interval 3 subglabrous, with few punctures. Penis as in Fig. 92b, transfer apparatus without median extension	Trigonopterus tepalensis Riedel, sp. n.
27 (20')	Tarsomere 3 of protarsus enlarged, medially deeply incised. Penis (Fig. 32b) in basal half with marked constriction; apex medially with distinct spine, with anterolateral subangular flanges	Trigonopterus fissitarsis Riedel, sp. n.
27'	Tarsomere 3 of protarsus of similar shape as tarsomere 3 of mesotarsus. Penis without marked constriction	28
28 (27')	Elytral intervals weakly costate, almost flat; striae consisting of rows of deeply impressed punctures	Trigonopterus tujuh Riedel, sp. n.
28'	Elytral intervals distinctly costate; striae incised	29
29 (28')	Abdominal ventrite 5 with median carina, at least in basal third	30
29'	Abdominal ventrite 5 without median carina	32
30 (29)	Elytral interval black; suture broadly sunk-in. Abdominal ventrite 5 with median carina in basal third	Trigonopterus delapan Riedel, sp. n.
30'	Elytral interval ferruginous. Abdominal ventrite 5 with complete median carina	31
31 (30')	Elytral intervals subglabrous, forming regular costae. Penis (Fig. 93b) with large anchor-shaped endophallic sclerite	Trigonopterus tiga Riedel, sp. n.
31'	Elytral intervals on dorsum punctate, along basal margin corrugate. Penis (Fig. 63b) with sides of body in basal half converging	Trigonopterus ranakensis Riedel, sp. n.
32 (29')	Metatibia apically with uncus and small premucro	33
32'	Metatibia apically with uncus, without premucro	34
33 (32)	Body (Fig. 27a) more slender. Suberect slender scales of elytral striae shorter	Trigonopterus dua Riedel, sp. n.
33'	Body (Fig. 69a) wider. Suberect slender scales of elytral striae longer	Trigonopterus rutengensis Riedel, sp. n.
34 (32')	Body (Fig. 31a) more slender. Suberect slender scales of elytral striae shorter	Trigonopterus enam Riedel, sp. n.
34'	Body wider (Figs 30a, 46a). Suberect slender scales of elytral striae longer	35
35 (34')	Penis (Fig. 46b) with transfer apparatus small, with median spine projecting to apex of endophallus	Trigonopterus lima Riedel, sp. n.
35'	Penis (Fig. 30b) with transfer apparatus compact, without median spine	Trigonopterus empat Riedel, sp. n.