Dianous aequalis Zheng, 1993

Shuai, Qi & Tang, Liang, 2019, The genus Dianous in Zhejiang, East China (Coleoptera, Staphylinidae), Zootaxa 4706 (2), pp. 275-295 : 285

6. Dianous aequalis Zheng, 1993

( Figs. 11, 12 , 65–76 , 117)

Dianous aequalis Zheng, 1993: 19 ; Puthz, 2000: 466; Puthz, 2016: 746 .

Material examined. China: Zhejiang: 2♂♂, Longwangshan , 4.X.2003, Hu & Tang leg. ( SHNU) ; 1♂ 2♀♀, Long- wangshan, 300–500m, 23–24.IV.2004, Hu & Zhu leg. ( SHNU) ; 1♂, Longwangshan , 950–1200m, 25.IV.2004, Li- ang Tang leg. ( SHNU) ; 2♀♀, Wuyanling , 700–850m, 10.V.2004, Hu, Tang & Zhu leg. ( SHNU) ; 7♂♂ 4♀♀, Qin- gliangfeng, 1050–1080m, 8–10.V.2005, Zhu & Li leg. ( SHNU) ; 1♀, Longwangshan , Anji County, 950–1200m, 25.IV.2006, Jin-Wen Li leg. ( SHNU) ; 2♂♂, Longwangshan , Anji County, 250m, 26.IV.2006, Liang Tang leg. ( SHNU) ; 2♂♂, Longwangshan, Shenxi Nongjia , 650m, 25.V.2009, Yuan & Yin leg. ( SHNU) ; 1♂ 1♀, Qingliang- feng, 800–1100m, 20.VII.2009, Feng, Yuan & Yin leg. ( SHNU) ; 2♂♂, Anji County, Longwangshan, Qianmutian , 30°24’N, 119°21’E, 1050–1250m, 7. VI.2012, Ning Lie leg. ( SHNU) ; 1♂ 3♀♀, Lin’an city, Pingxi , 1000–1100m, 30°23’N, 119°28’E, 9. VI.2012, Jian-Qing Zhu leg. ( SHNU) ; 4♂♂ 1♀♀, Anji County, Shenxi , 30°25’N, 119°24’E, 400m, 11. VI.2012, Jian-Qing Zhu leg. ( SHNU) ; 16♂♂ 19♀♀, Longquan City, Fengyangshan N.R., Huangmaojian , 27°53’23.75’’N, 119°10’32.88’’E, near stream, 1580m, 1.V.2016, Jiang, Liu & Zhou leg. ( SHNU) ; 1♂, Longquan, Fengyangshan N.R., Datianping, 27°54’29.67’’N, 119°10’31.45’’E, near stream, 1350m, 19.X.2017, Jiang, Cheng, Shen, Wang, Qiao & Chang leg. ( SHNU) ; 4♂♂ 9♀♀, Lin’an city, Yinlongwu Town, Qingliangfeng , 30°08’25’’N, 118°52’23.9’’E, 968–1046m, 30.IV.2018, near stream, Cheng & Shen leg. ( SHNU) ; 2♀♀, Longquan, Fengyangs- han, Mihou Valley , 27°55’17.03’’N, 119°11’37.59’’E, near stream, 1071m, 22.V.2018, Puthz, Tang, Cheng & Shuai leg. ( SHNU) ; 1♀, Longquan, Fengyangshan , 27°55’17.03’’N, 119°10’42’’E, 640m, surface of rocks in a stream, 8.V.2019, Tang & Zhao leg. ( SHNU) ; 1♀, Longquan, Fengyangshan, Mihou Valley , 27°55’20’’N, 119°11’37’’E, 950m, sifted, 9.V.2019, Tang & Zhao leg. ( SHNU) ; 6♀♀, Anji County, Longwangshan, Tonghanggang , 30.469372°N, 119.46779°E, 430m, 27.VII.2019, Cheng & Wang leg. ( SHNU) .

Measurements. BL: 3.9–4.8 mm, FL: 2.5–3.0 mm. HW: 0.93–1.09 mm, PL: 079– 0.92 mm, PW: 0.74–0.87 mm, EL: 1.00– 1.30 mm, EW: 1.02–1.30 mm, SL: 0.87–1.11 mm. Head 0.83–0.94 times as wide as elytra; Pronotum 1.00–1.11 times as long as wide; Elytra 0.98–1.06 times as long as wide.

Variability. The aedeagi of the specimens from Zhejiang are variable in the length and width of lateral lobes.

Distribution. China (Sichuan, Guizhou, Jiangxi, Guangdong, Zhejiang), Vietnam. New to Zhejiang.

Remarks. One character of the species, which could be normally niglected, is the shorten abdomen. And it will be easy to recognize the species by this character even in the field.

Figures

FIGURES 7–12. Adult habitus of Dianous. 7, 8 D. rugosipennis 9, 10 D. luteostigmaticus 11, 12 D. aequalis. Scale=1mm.

FIGURES 57–76. 57–64 Dianous luteostigmaticus 65–76 D. aequalis 57, 65 male sternite VIII 58, 66 female sternite VIII 59, 67 male tergites IX and X 60, 68 female tergites IX and X 61, 62, 69, 70, 71, 72, 73, 74 aedeagus 65, 75 male sternite IX 64, 76 valvifer. Scale bars = 0.25 mm.