Shirozuella nibagou Yu, 2000

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 : 94-95

Shirozuella nibagou Yu, 2000 Figs 18 –2041– 4368

Shirozuella nibagou : Yu et al., 2000: 188.

Diagnosis.

This species is easily distinguished from other Shirozuella by black body and elytron with a yellowish curved spot (Figs 18-19).

Description.

TL: 1.88mm, TW: 1.19mm, TH: 0.76mm, TL/TW: 1.58; PL/PW: 0.56; EL/EW: 1.03.

Body small, elongate oval, weakly convex. Dorsum covered with relatively sparse pubescence (Figs 18-20). Head black. Pronotum and scutellum black. Elytron blackish, with a curved large yellowish brown spot situated between 2/5 and 4/5 elytral length to apex. Underside uniformly dark.

Head moderately large, 0.36 × elytral width (HW/EW=2.77); frontal surface of head capsule flattened and rather weakly anteriorly inclined below; punctures on frons fine and sparse, separated by 2.0 –3.0× a diameter, with sparse long setae in punctures; eyes relatively large, narrowly separated; widest interocular distance 1.3 × narrowest width. Pronotum 0.69 × elytral width (PW/EW=1: 1.44), pronotal punctures very fine, inconspicuous, smaller than those on head. Scutellum moderately large, triangular, visible from above. Punctures on elytra large, irregular, obviously larger than those on head, separated by 0.2 –0.5× a diameter.

Surface of prosternum slightly mat and shagreened, punctures inconspicuous, with sparse short setae. Mesoventrite shiny and glabrous, punctures inconspicuous, with several short setae. Metaventrite broad and glabrous, median part concave, with complete median discrimen; punctures sparse and fine, with short sparse setae. Abdominal postcoxal line complete, reaching to 1/2 length of ventrite 1, then recurved basally (Fig. 41).

Male genitalia: Penis short and stout, penis capsule indistinct, apex rounded by membrane (Fig. 42); penis guide in lateral view slender, widest at base, tapering to apex, apex pointed and slightly curved; parameres slender, sparsely setose; penis guide in ventral view short and stout, parallel at basal 6/7, then converging sharply to teat-like tip (Fig. 43).

Female genitalia: Coxities elongate, tapering to blunt, darker apices, styli small and distinct, with short terminal setae; spermatheca not sclerotized.

Types examined.

Holotype: 1♂, China, Sichuan: Nibagou, Baoxing, [30°41.31'N, 102°42.87'E], ca viii.1997, Guo H. leg. (BAAF). Paratype: 1♀, same data as holotype.

Distribution.

China (Sichuan).