Scymnus (Parapullus) baxianshanensis, Chen, Xiaosheng, Ren, Shunxiang & Wang, Xingmin, 2015

Chen, Xiaosheng, Ren, Shunxiang & Wang, Xingmin, 2015, Contribution to the knowledge of the subgenus Scymnus (Parapullus) Yang, 1978 (Coleoptera, Coccinellidae), with description of eight new species, Deutsche Entomologische Zeitschrift 62 (2), pp. 211-224 : 211

Taxon classification Animalia Coleoptera Coccinellidae

Scymnus (Parapullus) baxianshanensis sp. n. Figs 2, 9

Diagnosis.

This species is most similar to Scymnus (Parapullus) alishanensis Pang & Yu, 1993 in general appearance and male genitalia, but can be distinguished from it by having parameres as long as half length of penis guide (Fig. 2h) and penis guide constricted at middle part in ventral view (Fig. 2g). In Scymnus (Parapullus) alishanensis , its parameres are longer than half length of penis guide and penis guide constricted near middle part in ventral view.

Description.

TL: 2.20-2.48 mm, TW: 1.60-1.71 mm, TH: 1.06-1.18 mm, TL/TW: 1.38-1.45, PL/PW: 0.54-0.55, EL/EW: 1.06-1.09, HW/PW: 0.59-0.60, PW/EW: 0.70-0.75.

Body elongate oval, moderately convex, entirely reddish brown, dorsum covered with white pubescence (Fig. 2 a–c).

Head with fine frontal punctures, slightly smaller than eye facets, 0.5-1.0 diameter apart. Eyes densely faceted, interocular distance 0.49 times head width. Pronotal punctures larger than those on frons, 1.0-2.0 diameters apart. Surface of elytra with punctures much larger than those on pronotum, separated by 1.0-2.0 diameters. Prosternal process trapezoidal, 2 times as long as its width at base; with lateral carinae distinct, extending to anterior margin of prosternum, slightly convergent anteriorly. Abdominal postcoxal lines weakly recurved and distinctly incomplete laterally (Fig. 2d), reaching 6/7 length of abdominal ventrite 1, area enclosed by lines finely punctate, narrowly smooth along line. Abdominal ventrite 5 in both sexes with apex truncate.

Male genitalia: penis stout (Fig. 2e). Penis capsule deeply emarginated medially with small inner arm and large outer arm. Apex of penis slender, forming a hook-shaped (Fig. 2f). Tegmen stout (Figs 2 g–h) with penis guide slightly constricted at middle part, expanding toward apex, then tapering abruptly to blunt apex in ventral view (Fig. 2g). Parameres narrow, as long as half length of penis guide, densely covered with two groups of long setae at apices (Fig. 2h).

Female similar to male except for sexual characters.

Type materials.

Holotype: male, No. SCAU (E) 11532, China: Tianjin: Baxianshan National Nature Reserve, Ji County, 40°11.27'N, 117°33.19'E, ca 500 m, 14. VII. 2011, Chen XS leg. Paratypes (3): 1♂2♀ with same data as holotype.

Distribution.

China (Tianjin).

Etymology. The specific epithet refers to its type locality, Baxianshan National Nature Reserve, Tianjin.