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Holotype, male (Fig. 97a). Length 2.40 mm. Color of antennae ferruginous; legs, rostrum, sutural interval of elytra dark ferruginous; remainder black. Body subovate; in dorsal aspect with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with median and pair of submedian ridges; intervening furrows with rows of indistinct, suberect scales; epistome indistinct, with median denticle. Pronotum with disk densely punctate; interspaces between punctures subglabrous, subequal to punctures´ diameter; median line impunctate. Elytra with striae marked by dense rows of small punctures; basal margin bordered by transverse row of deeper punctures; striae 7–9 near base with large punctures; sutural interval with additional row, other intervals subglabrous. Profemur with anteroventral ridge simple; meso- and metafemur with anteroventral ridge crenate-denticulate, ending with indistinct denticle in apical 1/4; anterior surface of femora coarsely punctate, each puncture with scale. Metafemur with dorsoposterior edge denticulate; subapically with stridulatory patch. Meso- and metatibia ventrally with row of long, stiff setae. Abdominal ventrite 1 concave, subglabrous; ventrite 5 with shallow concavity, densely covered with small upcurved transparent scales. Penis (Fig. 97b) with sides subparallel in basal 1/2, weakly widening before converging in apical 1/3 to subtruncate apex; ostium elongate, narrow, confined to midline; apodemes 2.1 × as long as body of penis; transfer apparatus spiniform, directed basad in repose; ductus ejaculatorius with distinct bulbus. Intraspecific variation. Length 2.40–2.54 mm. Female rostrum slender, dorsally subglabrous, sparsely punctate, epistome indistinct. Female abdominal ventrite 5 flat.
Holotype (MZB): ARC2754 (GenBank # MK260321), N-Sulawesi Prov., Tomohon, Rurukan, Gn. Mahawu, 01°21.409'N 124°51.535'E to 01°21.370'N 124°51.676'E, 1126–1231 m, beaten, 14-V-2012. Paratypes (MZB, SMNK): N-Sulawesi Prov.: 1 ex, ARC2755 (GenBank # MK260316), same data as holotype; 2 exx, ARC2770 (GenBank # MK260313), ARC2772 (GenBank # MK260318), Tomohon, Rurukan, Gn. Mahawu, 01°21.409'N 124°51.535'E, 1126 m, sifted, 14-V-2012; 4 exx, ARC6054 (GenBank # MK260320), ARC6055 (GenBank # MK260322), Gn. Mahawu, Tomohon, 01°20.844'N 124°52.253'E,1209 m, sifted, 15-V-2012; 1 ex, ARC6053 (GenBank # MK260319), Gn. Mahawu, Tomohon, 01°20.791'N 124°52.268'E,1230 m, sifted, 14-V-2012; 8 exx, Gn. Mahawu, Tomohon, 01°20.819'N 124°52.194'E,1278 m, sifted, 15-V-2012; 4 exx, Gn. Mahawu, Tomohon, 01°20.751'N 124°52.129'E, 1305 m, sifted, 15-V-2012; 6 exx, Tomohon, Rurukan, Gn. Mahawu, 1200 m, 30-XI-1999, sifted; 1 ex, Tomohon, Rurukan, Gn. Mahawu, 1150–1200 m, 30-XI/03-XII-1999; 3 exx, Airmadidi, Gn. Klabat, 01°26.430'N 125°00.622'E, 889 m, sifted, 17-V-2012; 1 ex, Airmadidi, Gn. Klabat, 01°26.505'N 125°00.636'E, 923 m, sifted, 16-V-2012; 3 exx, Airmadidi, Gn. Klabat, 01°26.619'N 125°00.805'E, 1018 m, sifted, 17-V-2012; 10 exx, ARC2784 (GenBank # MK260315X), ARC2785 (GenBank # MK260314), ARC2786 (GenBank # MK260317), Airmadidi, Gn. Klabat, 01°26.635'N 125°00.823'E, 1031 m, sifted, 16-V-2012; 2 exx, Airmadidi, Gn. Klabat, 01°26.754'N 125°01.014'E, 1145 m, sifted, 16-V-2012.
N-Sulawesi Prov. (Tomohon, Mt Klabat). Elevation 890–1305 m.
In leaf litter of montane forest.
This epithet is a Latinized adjective based on the town of Tomohon.
Trigonopterus tomohonensis Riedel, sp. n. was coded as “Trigonopterus sp. 403”.
- Riedel, A; Narakusumo, R; 2019: One hundred and three new species of Trigonopterus weevils from Sulawesi ZooKeys, (828): 1-153. doi