Cybocephalus (Cybocephalus) chlorocapitis

Hisamatsu, Sadatomo, 2013, A review of the Japanese Cybocephalidae (Coleoptera: Cucujoidea), Zootaxa 3616 (3), pp. 253-267 : 262-263

Cybocephalus (Cybocephalus) chlorocapitis S-T. Hisamatsu, sp. nov.

Figs 1 C, 7

Type series. Holotype: 3, NAZE / Amami Is. / 5. VI. 1960 / Taichi Shibata // HOLOTYPE / Cybocephalus (Cybocephalus) / chlorocapitis S-T. Hisamatsu, 2011 /. Paratype: [OKINAWA] 1Ƥ, Miyako Is., 5~ 7. V. 1998, M. Satô leg.

Type depository. The holotype and paratype are deposited in the EUM.

Etymology. The specific epithet is derived from the Latin wards “chloros” meaning green + “caput” meaning head.

Diagnosis. Surface of head and pronotum ( Fig. 1 C) with metallic-green sheen in both sexes, female sheen much reduced. Protibiae ( Fig. 7 D) wide (L/W = 3.90 (n = 1)), outer angle broadly rounded. Apical area of female gonocoxites ( Fig. 7 G) sclerotized.

Description. Length 1.70 mm (n = 1), width 0.93 mm (n = 1), height 0.50 mm (n = 1).

Male. Body convex; dorsal disc almost glabrous, strongly shining. Coloration black; base of mandibles, labrum, anterior half of head, marginal area of pronotum, and lateral and apical margins of elytra with metallicgreen sheen; labial and maxillary palpi, antennae (except brownish first and eleventh segments), lateral margins of pronotum, and tarsi yellow.

Head extremely wide; vertex rather sparsely punctate; interspaces smooth. Mentum trapezoidal, anterior margin deeply emarginate. Eyes large, visible from ventral aspect. Antennae ( Fig. 7 I) with club asymmetrical, 3- segmented; apical margin of eleventh segment widely rounded; approximate ratio of each segment (n = 1) is 2.90: 1.88: 2.02: 1.33: 1.44: 1.10: 1.17: 1.00: 1.40: 1.25: 1.71.

Pronotum convex, strongly transverse, 1.70 times as wide as long (n = 1); anterior angles rounded; posterior angles widely rounded; dorsal disc minutely punctuate; interspaces smooth. Scutellum with apex broadly rounded.

Elytra conjointly 0.89 times as long as wide (n = 1), 1.65 times as long as pronotum (n = 1); disc with two kinds of punctures; the larger one about as large as an eye-facet, possessing two lateral extensions and an associated recumbent seta; interspaces smooth. L/W = 3.90 (n = 1). Metaventrite convex at anterior half, posterior half depressed for reception of metafemora; disc covered with long, recumbent yellowish setae. Inter-metacoxal distance wide, separated by 1.33 (1.33) times as wide as inter- mesocoxal distance (n = 1). Abdominal sternites densely covered with long, recumbent yellowish setae; inter-metacoxal area of abdominal sternite III with widely rounded apical margin; femoral lines joined with anterior margin of abdominal sternite III. Legs ( Fig. 7 D–F) with protibiae wide (L/W = 3.90 (n = 1)); protibiae with broadly rounded outer apical angle. Claws simple.

Male genitalia with tegmen ( Fig. 7 A) gently narrowing to apex, setose around margins; lateral margins somewhat constricted at middle; apical margin widely rounded. Median lobe ( Fig. 7 C) in lateral view gently curved, strongly narrowing in apical third in ventral view; apical margin with protruded apex.

Female. Metallic sheen less developed than in male: base of mandibles, labrum, clypeus, anterior and posterior margins of pronotum with feebly metallic-green sheen. Apical margin of abdominal tergite and sternite VII rounded. Ovipositor ( Fig. 7 G) elongate and slender; coxite strongly sclerotized, deeply cleft and appearing separated, long styli present near apex; apex of stylus with 3~4 setae; 5~6 setae present along apico-lateral margin; spermatheca ( Fig. 7 H) oval, sclerotized; spermathecal gland straight, weakly sclerotized.

Bionomics. Biology unknown.

Distribution. This species is known only from the type locality on Amami and Miyako Islands, Japan. Remark. This new species is closely allied to C. (C.) liui Tian, known from Yunnan, China, in having metallic-green sheen on surface of head and pronotum and similar shape of median lobe, but can be distinguished by short, widened protibiae and the shape of tegmen. The present new species is also similar to C. (C.) chinensis Yu, known from Guangdong, China, C. (C.) festivus Erichson, known from Europe, and C. (C.) minimus Grouvelle, known from Madagascar and Seychelles, in having metallic-green sheen on surface of head and pronotum, but differs from them by the broadly rounded outer angle of protibiae and the shape of male genitalia.

Figures

FIGURE 1. Lateral habitus of Cybocephalidae spp. A, Cybocephalus (C.) nipponicus Endrödy-Younga, 1971 (male, Tokunomori, Ehime Pref.); B, Cybocephalus (C.) politissimus Reitter, 1898 (male, Yoshiji-chô, Shimane Pref.); C, Cybocephalus (C.) chlorocapitis sp. nov. (holotype, male, Amami Is.); D, Pastillus eminentithorax sp. nov. (paratype, female, Araike, Aichi Pref.). Scale bars = 1 mm.

FIGURE 7. Cybocephalus (C.) chlorocapitis sp. nov. A, tegmen, ventral view; B, median lobe, ventral view; C, median lobe, lateral view; D, left protibia; E, left mesotibia; F, left metatibia; G, ovipositor; H, spermatheca, spermathecal gland, and sperm duct; I, right antenna. A – F, I = holotype, Amami Is.; G, H = paratype, Miyako Is. Scale bars = 0.1 mm.