Scirtes sakaii 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 : 68-70

Scirtes sakaii Yoshitomi & Ruta , sp. n.

Figs. 40D , 44

Type material. Holotype ( EUM): 1 male, “[ North Thai ] Doi Pui (1350m) 22. X. 1983 M. Sakai leg.”, genit. s. no. HY 969.

Description. Male. Body oblong-oval, slightly convex above, shining, closely covered with short setae throughout. Coloration of head, labrum, antennomeres I–II, pronotum, meso- and metaventrites yellowishorange; scutellum dull orange; mouthparts, antennomeres III–XI, legs and elytra blackish brown.

Head moderate in size, almost flat on dorsal surface, finely punctate; clypeus rather long, slightly expanded antero-laterally, front margin almost straight. Eyes moderate in size, slightly prominent; the distance between the eyes ca. 2.4 times as long as the maximum diameter of an eye. Antennae slender, reaching ca. proximal 1/3 of elytra. Pronotum slightly convex above, strongly punctate; front and lateral margins almost straight; antero-lateral angles ca. 80º, gently projecting anteriorly; postero-lateral angles right-angled; posterior margin gently bisinuate; PW/PL 2.42. Scutellum moderate in size, finely punctate, equilateral-triangular. Elytra oblong, slightly convex above, widest at the middle, closely and strongly punctate; humeral portions slightly elevated; EL/EW 1.33; EL/PL 4.88; EW/PW 1.52; TL/EW 1.60. Hind tibial spurs gently curved laterally; dorsal spurs ca. 2.0 times as long as ventral ones, ca. 0.7 times as long as hind tarsomere 1. Caudal margin of sternite VII shallowly concave. Tergite VIII moderately sclerotized, trapezoidal, bearing short spines in apical part, with a pair of short apodemes. Tegmen large, well sclerotized; basal part oblong, subpalallel-sided; parameres long, as long as basal part, almost straight, pointed at apices, covered with minute punctures. Penis short, rod-like, well sclerotized; basal part slightly longer than tegmen, with membranous projections at apex.

Female. Unknown.

Measurements. Male (n = 1): TL 3.53 mm; PW 1.45 mm; PL 0.60 mm; EL 2.93 mm; EW 2.20 mm.

Distribution. Thailand.

Etymology. This species is named after Dr. Masahiro Sakai (EUM), collector of the holotype.

Notes. Externally resembling Scirtes curvans sp. n., differing in genital morphology: penis shorter than parameres.

Figures

FIGURE 40. Habitus of Scirtes spp. A) S. rufotinctus Champion, holotype, female, B) Scirtes curvans sp. n., holotype, male, C) S. dichrous Champion, holotype, male, D) S. sakaii sp. n., holotype, male.

FIGURE 44. Scirtes sakaii sp. n., holotype, male. A) sternites V–VII, B) tergite VIII, C) tegmen and penis in ventral aspect. Abbreviations: p, penis; t, tegmen.