Scirtes bidentatus Yoshitomi & Ruta, 2010

Yoshitomi, Hiroyuki & Ruta, Rafał, 2010, Revision of the Scirtes flavoguttatus species-group (Coleoptera: Scirtidae: Scirtinae) 2467, Zootaxa 2467 (1), pp. 1-74 : 38-39

Scirtes bidentatus Yoshitomi & Ruta , sp. n.

Figs. 13I , 22

Type material. Holotype ( EUM): 1 male, “( EAST MALAYSIA) Park Headquarters near Mt. Kinabalu Sabah, (Alt. 1700m) III–25, 1979 SHINJI NAGAI leg.”, genitalia on slide no. HY 954 . Paratype ( ITBC): 1 male, “ Kinabalu Park , HQ Ranau, Sabah, BORNEO 23-25. VII. 2008 H. Takizawa leg.” .

Description. Male. Body oblong, slightly convex above, shining, closely covered with fine setae throughout. Coloration of head, pronotum and scutellum blackish brown, except lateral part of pronotum yellowishbrown; elytra blackish-brown, but surrounding parts of scutellum, suture, mesal part and apices are yellowishbrown, with three pairs of oblong yellowish-brown spots on proximal 1/4 and 1/2 connecting; antennae, mouthparts, ventral surface of thorax and legs brown, femora infuscate.

Head relatively large, slightly convex above, closely punctate; clypeus long, slightly expanded laterally, shallowly concave in front margin. Eyes large, strongly prominent; the distance between the eyes ca. 1.4 times as long as the maximum diameter of the eye. Antennae long and stout, reaching ca. proximal 1/4 of elytra. Pronotum slightly convex above, distinctly and closely punctate in mesal part, indistinctly and finely punctate in lateral portions; antero-lateral angles obtuse, ca. 120º, not projecting anteriorly; front margin almost straight; lateral and posterior margins gently arcuate; postero-lateral angles ca. 120º; PW/PL 1.43. Scutellum moderate in size, equilateral-triangular, finely punctate. Elytra oblong, rather convex above, widest at the middle, closely punctate; humeri slightly elevated; EL/EW 1.55; EL/PL 4.54; EW/PW 2.05; TL/EW 1.89. Legs relatively long. Hind tibial spurs long, curved laterally; dorsal spurs ca. 1.9 times as long as ventral ones, ca. 0.6 times as long as hind tarsomere 1. Sternites III–IV covered sparsely with short setae; sternites V–VII closely covered with short setae. Caudal margin of sternite VII shallowly concave. Tergite VIII moderately sclerotized, trapezoidal, bearing long spines on apical margin, with a pair of short apodemes. Tegmen and penis connected; basal part of tegmen subtriangular; parameres stout, curved laterally, with two pairs of clawlike projections on lateral margins, sparsely punctate; penis longer than tegmen, pointed at apex.

Female. Unknown.

Measurements. Male (n = 1): TL 3.88 mm; PW 1.00 mm; PL 0.70 mm; EL 3.18 mm; EW 2.05 mm.

Distribution. Borneo Isl. (Sabah).

Etymology. The species name refers to the bidentate parameres.

Notes. Belongs to a group of species with uniformly brown elytra, resembling Scirtes sulcigerus Champion and S. maramagensis Klausnitzer on the basis of edeagal morphology; apex of penis membranous (well sclerotized in S. bidentatus sp. n.); parameres bidentate (tridentate in S. maramagensis ).

Figures

FIGURE 13. Habitus of Scirtes spp. A) S. kodadai sp. n., B) S. tanahratensis sp. n., C) S. malaccanus sp. n., D) S. malcolmi sp. n, E) S. basifasciatus Pic, holotype, F) S. curtelineatus Pic, syntype, G) S. philippinensis sp. n., holotype, H) S. flavocinctus Champion, syntype, I) S. bidentatus sp. n., holotype.

FIGURE 22. Scirtes bidentatus sp. n., holotype, male. A) sternite V–VIII, B) tergite VIII, C) tegmen and penis in ventral aspect. Abbreviations: p, penis; t, tegmen.