Scirtes crassicornis Champion, 1918

Yoshitomi, Hiroyuki & Ruta, Rafał, 2010, Revision of the Scirtes flavoguttatus species-group (Coleoptera: Scirtidae: Scirtinae) 2467, Zootaxa 2467 (1), pp. 1-74 : 54

Scirtes crassicornis Champion, 1918

Figs. 31D , 34 , 45B

Scirtes crassicornis Champion, 1918: 260 .

Type material. Holotype ( BMNH): 1 male, “Type H. T.”; “ Penang, G. E. Bryant. 31. X. 13.”; “ ♂ ”; “ Scirtes crassicornis Ch. ”.

Redescription. Male. Body oblong-oval, strongly convex above, shining, closely covered with brownish setae throughout. Coloration of body dark brown; mouthparts and antennomeres 1–3 and 11 yellowish; maxillary palpi dark brown.

Head moderate in size, slightly convex above in dorsal surface, closely covered with fine punctures; clypeus long, straight in front margin. Eyes moderate in size, prominent; the distance between the eyes ca. 2.2 times as long as maximum diameter of an eye. Antennae subserrate, antennomeres 4–10 widened, reaching ca. proximal 1/3 of elytra. Pronotum slightly convex above in mesal part of the disk, punctured as on head; front and lateral margins gently arcuate; antero-lateral angles obtuse, ca. 100°; postero-lateral angles almost right-angled; posterior margin gently bisinuate; PW/PL 2.31. Scutellum moderate in size, equilateral-triangular, punctured as on head. Elytra oblong, widest at the 1/2, punctures slightly stronger than pronotum; shoul- der parts distinct; EL/EW 1.21; EL/PL 4.38; EW/PW 1.56; TL/EW 1.49. Hind coxal plates rectangular. Legs relatively long; hind legs stout; hind tibial spurs long, almost straight; dorsal spurs ca. 2.5 times as long as ventral ones, ca. 0.8 times as long as tarsomere 1. Sternites III–IV sparsely covered with short setae; sternites V–VII closely covered with long setae. Caudal margin of sternite VII shallowly concave. Tergite VIII well sclerotized, trapezoidal, bearing short spines on posterior margin; tergite IX membranous, with a pair of long apodemes; sternite IX lightly sclerotized, consisting of paired subrectangular plates, closely covered with short setae in posterior portion. Tegmen large, well sclerotized; basal part oblong; parameres long, bifid, outer portion of each paramere about twice as long as inner portion. Penis long, well sclerotized in basal portion; apical portion relatively wide, as long as parameres.

Female unknown.

Measurements. Male (n = 1): TL 3.50 mm; PW 1.50 mm; PL 0.65 mm; EL 2.85 mm; EW 2.35 mm.

Distribution. Malaysia: Penang.

Notes. Externally resembling Scirtes sulcigerus Champion , antennae subserrate, antennomeres 4–10 black, apical antennomere yellow.

Figures

FIGURE 31. Habitus of Scirtes spp. A) S. balehensis sp. n., holotype, male, B) S. maramagensis Klausnitzer, C) S. sulcigerus Champion, syntype, male, D) S. crassicornis Champion, holotype, male, E) S. patkainus Champion, holotype, male, F) S. malayanus Champion, holotype, male, G) S. cameroni sp. n., holotype, H) S. sabahensis sp. n., holotype, male, I) S. brancuccii sp. n., holotype, male.

FIGURE 34. Scirtes crassicornis Champion, holotype, male. A) tergite VIII, B) tergite IX, C) sternite IX, D) tegmen and penis in ventral aspect.

FIGURE 45. Type labels of selected Scirtes spp. A) S. basifasciatus Pic, holotype, B) S. crassicornis Champion, holotype, C) S. curtelineatus Pic, holotype, D) S. curvipes Champion, holotype, E) S. dichrous Champion, holotype, F) S. luteomaculatus Pic, lectotype, G) S. patkainus Champion, holotype, H) S. malayanus Champion, holotype, I) S. rufotinctus Champion, holotype.