Axinoscymnus pingxiangicus Peng et Chen, 2022

Peng, Feng, Xie, Xiufeng, Peng, Zhengqiang, Wang, Xingmin & Chen, Xiaoshen, 2022, A taxonomic review of the genus Axinoscymnus Kamiya, with descriptions of three new species (Coleoptera, Coccinellidae), Zootaxa 5154 (4), pp. 431-453 : 451-452

Axinoscymnus pingxiangicus Peng et Chen , sp. n.

( Figs 1a–h , 13a–g )

Diagnosis. This species is similar to A. nigripennis Kamiya in colour pattern but can be separated from the latter by slightly rounded body shape ( Fig. 13a ), the triangular penis guide in inner view ( Fig. 13g ) and ventrite 1 with fine punctures at middle ( Fig. 13d ). In A. nigripennis , it has an elongate oval body shape ( Fig. 12a ), the parallel sided penis guide in inner view ( Fig. 12g ) and ventrite 1 with coarse punctures at middle ( Fig. 12d ).

Description. TL: 1.42–1.66 mm, TW: 1.06–1.29 mm, TH: 0.73–0.91 mm, TL/TW: 1.28–1.34, EL/EW: 1–1.03, PL/PW: 0.47–0.49, HW/PW: 0.66–0.70, PW/EW: 0.66–0.67.

Body slightly oval, moderately convex, dorsum with white pubescence ( Figs 13a–c ). Head, antennae and mouthparts yellowish brown ( Figs 1a , 13c ), tip of mandibles dark brown. Pronotum and scutellar shield yellowish brown. Elytra black with narrowly apical margins yellowish brown ( Figs 13a–b ). Prothoracic hypomeron and prosternum yellowish brown. Mesoventrite and elytral epipleurae blackish brown. Metaventrite black. Legs yellowish brown.

Head with fine frontal punctures, slightly larger than eye facets, 0.5–1.0 diameters apart. Eye densely faceted, interocular distance about 0.29 times of head width ( Figs 1a , 13c ). Pronotal punctures slightly larger than those on frons, 0.5–1.5 diameters apart. Surface of elytra with punctures much larger than those on pronotum, separated by 1.0–2.0 diameters.

Abdominal postcoxal lines complete and moderately recurved, reaching 2/3 length of ventrite 1 ( Fig. 13d ), area enclosed by the lines finely and sparsely punctate, irregularly distributed, broadly smooth along the lines; ventrite 1 with fine and sparse punctures at middle, irregularly distributed.

Male genitalia. Penis short and slender, slightly broadened at base, apex pointed ( Fig. 13e ); tegmen with penis guide in lateral view widest at base, gradually tapering to apex ( Fig. 13f ), in inner view subtriangular and stout ( Fig. 13g ), about 1/2 length of parameres; parameres stout and elongate oval with few setae at apex in lateral view ( Fig. 13f ).

Type material. Holotype: male, No. SCAU (E)17041, CHINA: Guangxi: Daqingshan Mountains, Pingxiang , 2. VIII. 2005, Wang XM leg ( SCAU) . Paratypes: Guangxi: 1♀, with same data as holotype . 1♂ 1♀, Tongling Canyon, Huatong, 5. VIII. 2005, Wang XM leg. 1♂ 3♀, Pingxiang, Collecter unknown.

Distribution. China (Guangxi).

Etymology. The specific epithet is given after Pingxiang City, the type locality of this species.

Figures

FIGURE 1. Main characters of the genus Axinoscymnus Kamiya: a–h Axinoscymnus pingxiangicus Peng et Chen, sp. n.: a head b prothorax, ventral view c prothorax, frontal view d hind leg e labium f antenna g maxilla h mandible i–j Axinoscymnus beneficus Kamiya, 1963: i spermatheca j coxites. Scale bars: 0.1 mm.

FIGURE 12. Axinoscymnus nigripennis Kamiya, 1965: a dorsal view b lateral view c frontal view d abdomen e penis f tegmen, lateral view g tegmen, inner view. Scale bars: a–c: 0.5 mm, d: 0.1 mm, e–g: 0.05 mm.

FIGURE 13. Axinoscymnus pingxiangicus Peng et Chen, sp. n.: a dorsal view b lateral view c frontal view d abdomen e penis f tegmen, lateral view g tegmen, inner view. Scale bars: a–c: 0.5 mm, d: 0.1 mm, e–g: 0.05 mm.