Dianous vorticipennis Puthz, 2005

Tang, Liang, Wang, Wei, Szx, Olympus & Eos, Canon, 2018, Notes on the Dianous luteoguttatus complex with description of a new species (Coleoptera: Staphylinidae), Acta Entomologica Musei Nationalis Pragae 58 (1), pp. 237-242 : 238-239

Dianous vorticipennis Puthz, 2005

( Figs 5 , 15–17 )

Dianous vorticipennis Puthz, 2005: 144 .

Material examined. CHINA: YUNNAN: 3, Gongshan County, Qiqi, alt. 1900 m, 2.vii.2010, Liang Tang leg. ( SHNU).

Measurements. BL: 7.5–7.9 mm, FL: 3.6–3.8 mm. HW: 1.43–1.44 mm, PL: 1.13–1.15 mm, PW: 0.98 mm, EL: 1.55–1.58 mm, EW: 1.28 mm, SL: 1.26–1.28 mm. Head 1.12–1.13 times as wide as elytra; pronotum 1.13–1.15 times as long as wide; elytra 1.22–1.24 times as long as wide.

Description of male. Sternite VII flattened posteromedially with shallow emargination along posterior margin of the flatten area; sternite VIII ( Fig. 17 ) with emargination in the middle of posterior margin which is 0.13 times as long as the sternite; sternite IX ( Fig. 16 ) with apicolateral projections slender and long, situated sublaterally rather than laterally, hind margin between projections serrate; tergite X with posterior margin broadly rounded. Aedeagus ( Fig. 15 ) nearly same to that of D. lilizheni sp. nov. except apical sclerotized area broader, parameres slightly longer than median lobe with 14–15 setae on inner side of apical portion.

Distribution. China (Yunnan).

Remarks. The species can be easily distinguished from the other members of Dianous luteoguttatus complex by the characters mentioned by PUTHZ (2005) and the key below. Additionally, the widest point of the elytra is distinctly anteriad of the basal half in this species, while always being posteriad of the basal half in the remaining species.

Figures

Figs 1–6. Habitus of the species of the Dianous luteoguttatus species complex. 1 – D. luteoguttatus Champion, 1919; 2 – D. cruentatus L. Benick, 1942; 3 – D. rimosipennis Puthz, 2005; 4 –D. depressifrons Puthz, 2016; 5 –D. vorticipennis Puthz, 2005; 6 – D. lilizheni sp. nov. Scale bars: 1 mm.

Figs 15–22. Male sexual characters. 15–17 – Dianous vorticipennis Puthz, 2005; 18–22 – D. lilizheni sp. nov.; 15, 20, 21 – aedeagus; 16, 22 – sternite IX; 17, 19 – sternite VIII; 18 – tergites IX and X. Scale bars: 0.25 mm.