Shirozuella tibetina, Wang, Xing-Min, Ge, Feng & Ren, Shun-Xiang, 2012

Wang, Xing-Min, Ge, Feng & Ren, Shun-Xiang, 2012, The genus Shirozuella Sasaji (Coleoptera, Coccinellidae, Shirozuellini) from the Chinese mainland, ZooKeys 182, pp. 87-108 : 95-97

Shirozuella tibetina sp. n. Figs 21 –2344– 4868

Diagnosis.

This species is close to Shirozuella nibagou in general appearance, but it can be distinguished from the latter as follows: posterior margin of abdominal postcoxal line reaching to 4/5 ventrite length (Fig. 44), and elytral spots are not curved (Figs 21-22). In Shirozuella nibagou , posterior margin of abdominal postcoxal line reaching to 1/2 ventrite length (Fig. 41), and elytral spots are curved (Figs 18-19). The male genitalia are also diagnostic.

This species is also similar to Shirozuella schawalleri (Canepari & Milanese, 1997) in general appearance, but it can be distinguished from the latter by elytra with a curved yellowish brown spot and elongated triangular coxities. In Shirozuella schawalleri , spots on elytra are straight and oblique and outer margins of coxities arcuate.

Description.

TL: 1.68-1.75mm, TW: 1.02-1.12mm, TH: 0.66-0.76mm, TL/TW: 1.41-1.44; PL/PW: 0.51-0.52; EL/EW: 1.18-1.19.

Body small, elongate oval, weakly convex, dorsum covered with sparse pubescence (Figs 21-23). Head black with maxillary palpus brown. Pronotum black with anterior slightly brown, scutellum black. Elytron black, with a curved yellowish brown spot situated between 2/5 and 4/5 elytral length to apex. Ventral surface dark, except elytral epipleura and legs brown.

Head moderately large, 0.38 × elytral width (HW/EW=2.62); frontal surface of head capsule flattened and rather weakly anteriorly inclined below; punctures on frons fine, separated by 2.0 –4.0× a diameter, with sparse long setae in punctures; eyes relatively large, narrowly separated; widest interocular distance about 1.5 × narrowest width. Pronotum 0.68 × elytral width (PW/EW=1: 1.48), pronotal punctures very fine, smaller than those on head, separated by 2.0 –4.0× a diameter. Scutellum moderately large, triangular. Punctures on elytra moderately large, obviously larger than those on pronotum, separated by 1.5 –2.5× a diameter.

Pro- and mesoventrite slightly shagreened, punctures inconspicuous, with sparse short setae. Metaventrite broad and glabrous, median part concave, with complete median discrimen; punctures fine and sparse, separated by about 2.0 –4.0× a diameter, with short sparse setae. Abdominal postcoxal line complete, reaching to 4/5 length of ventrite 1 (Fig. 44).

Male genitalia: Penis short and stout, penis capsule distinct, apex blunt and slightly swollen (Fig. 45); penis guide in lateral view stout, widest at basal 2/5, apex pointed and curved (Fig. 46); parameres slender, sparsely setose at apex, distinctly longer than penis guide (Fig. 46); penis guide in ventral view short and stout, parallel at basal 10/11, then converging sharply to pointed apex (Fig. 47).

Female genitalia: Coxities elongate, subtriangular, about 3.5 × as long as wide, tapering to blunt, darker apices, styli small and distinct, with short terminal setae (Fig. 48); spermatheca not sclerotized.

Types.

Holotype: China, Tibet: 1♂, Xiayadong town, Yadong, [28°29.29'N, 97°1.36'E], ca 2800m, 1.x.2009, Wang XM et al. leg.(SCAU). Paratypes: Tibet: 1♂6♀♀, same data as holotype (SCAU); 2♀♀, North of Chayu City, [28°42.03'N, 97°27.77'E], ca 2300m, 18.x.2007, Wang XM leg. (SCAU); 1♂1♀, Le Village, Cuona, [27°48.63'N, 91°44.98'E], ca 2400m, 3.x.2009, Wang XM et al. Leg. (SCAU).

Distribution.

China (Tibet).

Etymology.

The specific epithet is in reference to Tibet, the type locality of this ladybird.