Dianous brevicornis Puthz, 2000

Tang, Liang & Hu, Cheng-Zhi, 2018, Notes on the Dianous aereus complex with description of a new species (Coleoptera, Staphylinidae), Zootaxa 4514 (4), pp. 573-582 : 581

Dianous brevicornis Puthz, 2000

( Figs. 6 , 12, 18, 20, 28, 35, 36)

Dianous brevicornis Puthz, 2000: 453 .

Material examined. CHINA: Yunnan: 3♂♂, Lijiang City, Hutiaoxia , alt. 1700m, 1.VIII.2010, Xiao-Bing Song leg. (SHNU).

Measurements. BL: 4.8–4.9 mm, FL: 2.6–2.9 mm. HW: 0.93–0.95 mm, PL: 0.74–0.80 mm, PW: 0.76–0.82 mm, EL: 1.20–1.27 mm, EW: 1.19–1.29 mm, SL: 1.06–1.08 mm. Head 0.73–0.78 times as wide as elytra, pronotum 0.95–0.99 times as long as wide, elytra 0.98–1.01 times as long as wide.

Male. Sternite VII (Fig. 12, 18) impressed at posteromedian part delimited by edged ridge on each side, posterior margin of the impression emarginated with long projection on each side; sternite VIII ( Fig. 20 ) with deep emargination in the middle of posterior margin which is 0.27 times as long as the sternite; sternite IX (Fig. 28) with apicolateral projections indistinct, posterior margin serrate. Aedeagus ( Figs. 36, 37 ) slender, median lobe gradually tapering apicad and pointed at apex, apical sclerotized area slightly twisted on right side with numerous long and short setae ventrally; parameres broaden at apical third, each with 11–13 setae on inner side of apical portion.

Distribution. China (Yunnan).

Remarks. The species was described on a female from Yulongshan of Lijiang. The above male specimens fit the description of the female holotype in all aspects and were collected from a locality very close to the type locality. For these reasons, we believe these are the males of D. brevicornis .

Figures

FIGURES 1–6. Habitus of the species of the Dianous aereus complex. 1 D. vietnamensis 2 D. rougemontianus 3 D. ruginosus 4 D. aerator 5 D. pseudaerator 6 D. brevicornis. Scale bars: 1 mm.

FIGURES 13–22. Sexual characters. 13–18 male sternite VII 19, 20 male sternite VIII 21 female sternite VIII 22 valvifer 13 Dianous vietnamensis 14 D. rougemontianus 15 D. ruginosus 16 D. aerator 17, 21, 22 D. pseudaerator 18, 20 D. brevicornis. Scale bars: 0.25 mm.

FIGURES 31–37. Aedeagus. 31 D. ruginosus 32, 33 D. aerator 34, 35 D. pseudaerator 36, 37 D. brevicornis. Scale bars: 0.25 mm.