Axinoscymnus singaporicus Pang et Gordon, 1986

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 : 440-441

Axinoscymnus singaporicus Pang et Gordon, 1986

( Figs 6a–d )

Axinoscymnus singaporicus Pang et Gordon, 1986: 186 .

Diagnosis. This species is similar to A. beneficus Kamiya in the elytral colour patterns but can be distinguished from the latter by the stout penis with blunt apex according to the illustrations given by Pang & Gordon (1986). It also resembles with A. fumatus (Sicard) in the dark brown elytra and stout penis, but can be separated from the latter by its elytra with yellowish brown basal margin ( Fig. 6a ).

Description. TL: 1.65–1.71 mm, TW: 1.19–1.22 mm, TH: 0.88–0.92 mm, TL/TW: 1.35–1.44, EL/EW: 1.04– 1.11, PL/PW: 0.48–0.52, HW/PW: 0.67–0.69, PW/EW: 0.67–0.70.

Body oval, moderately convex, dorsum with pale yellow pubescence ( Figs 6a–c ). Head, antennae and mouthparts yellow ( Fig. 6b ), tip of mandibles dark brown. Pronotum and scutellar shield yellow. Elytra dark brown, basal margin yellowish brown ( Figs 6a–c ). Prothoracic hypomeron and prosternum yellow. Mesoventrite and metaventrite dark brown. Elytral epipleurae black. Legs yellow.

Head with fine frontal punctures, as large as eye facets, 1.0–1.5 diameters apart. Eyes densely faceted, interocular distance about 0.27 times of head width ( Fig. 6b ). Pronotal punctures slightly larger than those on frons, 1.0–1.5 diameters apart. Surface of elytra with punctures much larger than those on pronotum, separated by 1.0–2.0 diameters.

Male genitalia. The male genitalia of the paratype we examined were lost. For detailed illustrations see Pang & Gordon (1986).

Material examined. Paratypes: 2♂, on Aleyrodid , Singapore, 29. VII. 1929, No. #2407, Clausen CP leg ( SCAU, Fig. 6d ) .

Distribution. Singapore.

Remark. The holotype of this species is deposited in the collection of the United States National Museum (USNM), Washington. Two paratype specimens were preserved in the collection of Department of Entomology, South China Agricultural University (SCAU). However, these two paratypes are discolored and their male genitalia were lost.

Figures

FIGURE 6. Axinoscymnus singaporicus Pang et Gordon, 1986 (Paratype): a dorsal view b ventral view c lateral view d labels of paratype. Scale bars: a–c: 0.5mm.