Trigonopterus pseudanalis Riedel

Riedel, Alexander & Narakusumo, Raden Pramesa, 2019, One hundred and three new species of Trigonopterus weevils from Sulawesi, ZooKeys 828, pp. 1-153 : 1

68. Trigonopterus pseudanalis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 68a). Length 2.95 mm. Color of antennae and legs ferruginous; remainder black with slight bronze luster. 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 erect yellowish scales; epistome indistinct, subglabrous, sparsely setose. Pronotum with disk densely, coarsely punctate; punctures subovate, with oblique anteriomesad orientation; interspaces between punctures subglabrous, reticulate; in anterior 1/2 punctures with clavate, yellowish scale; median line impunctate. Elytra irregularly punctate with small punctures; interspaces subglabrous; basal margin bordered by deeper punctures and almond-shaped yellowish scales; near apex striae more distinctly impressed, with sparse rows of yellowish scales; apex subtruncate. Femora with anteroventral ridge ending with small tooth; anterior surface coarsely punctate, each puncture with narrow yellowish scale. Metafemur with dorsoposterior ridge denticulate, subapically with stridulatory patch. Meso- and metatibia with dorsal edge irregularly serrate. Metatibia ventrally with fine ridge; subapically near uncus with fine row of long setae. Abdominal ventrites 1-2 weakly concave, with scattered erect white scales, especially behind metacoxa; ventrite 5 concave, subglabrous, microreticulate, at basal margin with median denticle and pair of sublateral denticles, apex curved ventrad forming truncate lamina. Penis (Fig. 68b) with body at middle with narrow lateral membranous lobes; weakly converging; apex subtruncate, sparsely setose; apodemes 1.7 × as long as body of penis; transfer apparatus hook-shaped, ca. 0.4 × length of body, basally continued as fork-shaped sclerite; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.18-2.95 mm. Female rostrum slender, dorsally subglabrous, with submedian and sublateral rows of punctures. Female abdominal ventrite 5 weakly concave, punctate, with sparse scales.

Material examined.

Holotype (MZB): ARC3213 (GenBank # MK260628), S-Sulawesi, Mangkutana, 02°20.306'S 120°46.792'E, 909 m, sifted, 14-V-2013. Paratypes (MZB, SMNK): S-Sulawesi: 6 exx, ARC3214 (GenBank # MK260629), ARC3215 (GenBank # MK260630), ARC3216 (PCR failed), same data as holotype; 5 exx, Mangkutana, 02°20.203'S 120°46.878'E, 903 m, sifted, 14-V-2013; C-Sulawesi: 1 ex, ARC3140 (PCR failed), Pendolo, Boe, 02°05.405'S 120°38.551'E, 857 m, sifted, 15-V-2013.

Distribution.

S-Sulawesi Prov. (Mangkutana), C-Sulawesi Prov. (Pendolo). Elevation 860-910 m.

Biology.

In leaf litter of lowland forest.

Etymology.

This epithet is a Latinized adjective based on the Greek prefix pseudo- (false) and the name of T. analis Riedel, sp. n., a sibling species.

Notes.

Trigonopterus pseudanalis Riedel, sp. n. was coded as " Trigonopterus sp. 944". This species is very closely related to T. analis Riedel, sp. n., from which it differs by ca. 11.7-12.7% p-distance of cox1, by the apex of the penis, and by a stouter body shape with a more densely punctate pronotum.