Axinoscymnus hamulatus 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 : 444-445

Axinoscymnus hamulatus Peng et Chen , sp. n.

( Figs 9a–g )

Diagnosis. This species is similar to A. puttarudriahi Kapur et Munshi in male genitalia but can be distinguished from the latter by the black head ( Fig. 9c ), the blackish brown pronotum and the black elytra without dark brown oval markings ( Fig. 9a ). In A. puttarudriahi , elytra are black with a single elongate oval dark brown spot on each elytron ( Fig. 8a ).

Description. TL: 1.36–1.48 mm, TW: 0.91–0.97 mm, TH: 0.62–0.68 mm, TL/TW: 1.49–1.53, EL/EW: 1.15– 1.21, PL/PW: 0.48–0.55, HW/PW: 0.67–0.72, PW/EW: 0.72–0.73.

Body elongate oval, moderately convex, dorsum with white pubescence ( Figs 9a–c ). Head black, antennae and mouthparts yellowish brown ( Fig. 9c ), tip of mandibles dark brown. Pronotum and scutellar shield blackish brown. Elytra black ( Figs 9a–c ). Prothoracic hypomeron and prosternum blackish brown. Mesoventrite, metaventrite, and elytral epipleurae black. Legs yellowish brown.

Head with fine frontal punctures, slightly larger than eye facets, 0.5–1.5 diameters apart. Eye densely faceted, interocular distance 0.34 times of head width ( Fig. 9c ). Pronotal punctures slightly larger than those on frons, 0.5–2.0 diameters apart. Surface of elytra with punctures much larger than those on pronotum, separated by 1.0–2.0 diameters.

Abdomen dark brown. Abdominal postcoxal lines complete and strongly recurved, nearly reaching posterior margin of ventrite 1 ( Fig. 9d ), area enclosed by the lines finely and sparsely punctate, irregularly distributed, broadly smooth along the lines; ventrite 1 with coarse punctures at middle, extremely sparse.

Male genitalia. Penis short and slender, slightly broadened at base, apical 2/3 narrowing and apex blunt ( Fig. 9e ); tegmen with penis guide widest at base, slowly narrowing to apical 1/2, then slightly curved and abruptly tapering to apex in lateral view ( Fig. 9f ), slightly shorter than parameres; in inner view, penis guide subtriangular, widest at base, then gradually tapering to pointed apex ( Fig. 9g ); parameres stout and elongate oval with a few setae at apex in lateral view ( Fig. 9f ).

Type material. Holotype: male, No. SCAU (E)17042, CHINA: Yunnan: Longmen, Shangyong, Mengla , Jinghong , 1. V. 2008. Wang XM et al. leg ( SCAU) . Paratype: Yunnan: 1♀, with same data as holotype ( SCAU) .

Distribution. China (Yunnan).

Etymology. The specific epithet is derived from the Latin adjective “ hamulatus ”, referring to its penis guide distinctly curved inwardly in lateral view.

Figures

FIGURE 8. Axinoscymnus puttarudriahi Kapur et Munshi, 1965: a dorsal view b lateral view c frontal view d abdomen e penis f tegmen, lateral view. Scale bars: a–c: 0.5 mm, d: 0.1 mm, e–f: 0.05 mm.

FIGURE 9. Axinoscymnus hamulatus 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.