Dianous depressifrons Puthz, 2016

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

Dianous depressifrons Puthz, 2016

( Figs 4 , 11–14 )

Dianous depressifrons Puthz, 2016: 731 .

Material examined. CHINA: GUANGXI: 25 9 ♀♀, Lingui County, Huaping N. R., Anjiangping, alt. 1200 m, 13–18.vii.2011, Peng & Zhu leg. ( SHNU); 2 4 ♀♀, Jinxiu County, Shengtangshan, alt. 1000–1200 m, 27.vii.2011, Peng Zhong leg. ( SHNU); 4 3 ♀♀, Jinxiu County, 16 km, alt. 900 m, 29.vii.2011, Peng Zhong leg. ( SHNU); FUJIAN: 4, Wuyishan City, Guadun Vill., 27 ° 44 ′ N 117 ° 37 ′ E, alt. 1200–1500 m, 24–28.v.2012, Peng & Dai leg. ( SHNU).

Measurements. BL: 5.3–6.1 mm, FL: 2.9–3.1 mm. HW: 1.04–1.16 mm, PL: 0.84–0.95 mm, PW: 0.76–0.84 mm, EL: 1.24–1.41 mm, EW: 1.11–1.29 mm, SL: 1.05–1.15 mm. Head 0.90–0.94 times as wide as elytra; pronotum 1.03–1.15 times as long as wide; elytra 1.01–1.15 times as long as wide.

Description of male. Sternite V flattened posteromedially; sternite VI impressed at posteromedian part, posterior margin of the impression emarginate with a sharp projection on each side, pubescence of impression distinctly longer; sternite VII slightly impressed with shallow emargination along posterior margin of the impression, pubescence of impression distinctly longer; sternite VIII ( Fig. 13 ) with deep emargination in the middle of posterior margin; sternite IX ( Fig. 12 ) with apicolateral projections very strong and sharply pointed, posterior margin serrate; tergite X with posterior margin slightly emarginate. Aedeagus ( Fig. 11 ) slender, apical sclerotized area nearly triangular with a short transverse ridge at middle; parameres slightly longer than median lobe, each with 24–28 setae on inner side of apical portion.

Distribution. China (Guangxi, Fujian), Vietnam.

Remarks. The species is the smallest member of the complex with the elytra punctation less confluent. The species is new to China.

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 7–14. Sexual characters. 7–9 – Dianous cruentatus L. Benick, 1942; 10 – D. rimosipennis Puthz, 2005; 11–14 – D. depressifrons Puthz, 2016; 7, 11 – aedeagus; 8, 12 – male sternite IX; 9, 13 – male sternite VIII; 10, 14 – valvifer. Scale bars: 0.25 mm.