Hesperus susannekontrusae Schillhammer, 2005

Cai, Yu-Jie, Li, Yue-Yang & Tang, Liang, 2024, New species group and two new species of the genus Hesperus from China (Coleoptera: Staphylinidae: Philonthina), Zootaxa 5474 (5), pp. 550-562 : 553-554

Hesperus susannekontrusae Schillhammer, 2005

(Chinese name: ŵDz刃Ḇdzûà)

( Figs 5, 6 , 15, 21 , 35–39)

Hesperus susannekontrusae Schillhammer, 2005: 180 ; Li, Zhou & Schillhammer, 2010: 535.

Material examined. China: Hainan: 1♂, Wuzhishan City, Mt. Wuzhishan , alt. 700–1000m, 18.IV. 2012, YIN Zi- Wei leg. ( SHNU) ; 2♂♂, Lingshui County, Diaoluoshan N. R ., Houshan, 18°43′46.81″N, 109°51′38.52″E, alt. 900–

1250m, 13–14.XI.2022, Cai & Zhou leg. ( SHNU); Yunnan: 2♂♂ 1♀, Nangongshan, Xishuangbanna , 7. VII .2003 , Hu & Tang leg. ( SHNU); 1♀, Dehong District, Ruili City, Huyu Vill. , Wudian , alt. 524m, 04.IV.2013, Wen-Xuan Bi leg. ( SHNU) .

Redescription. Measurements of male: BL: 10.13–11.23 mm, FL: 4.48–4.85 mm. HL: 1.10–1.15 mm, HW: 1.70–1.75 mm, EYL: 0.57–0.60 mm, TL: 0.40–0.425 mm, PL: 1.63–1.72 mm, PW: 1.55–1.67 mm, EL: 2.15–2.32 mm, EW: 2.30–2.45 mm. HW/HL: 1.52–1.55, TL/EYL: 0.70–0.71, PL/PW: 1.03–1.06, EL/EW: 0.93–0.95.

Measurements of female: BL: 9.14–9.73 mm, FL: 4.81–5.39 mm. HL: 1.11–1.24 mm, HW: 1.76–1.86 mm, EYL: 0.59–0.71 mm, TL: 0.40–0.43 mm, PL: 1.71–1.92 mm, PW: 1.67–1.86 mm, EL: 2.32–2.66 mm, EW: 2.57– 2.85 mm. HW/HL: 1.50–1.58, TL/EYL: 0.61–0.68, PL/PW: 1.02–1.03, EL/EW: 0.90–0.93.

Distribution. This species is distributed in southwestern and southern China (Hainan, Yunnan), northeastern Myanmar (Shan State), and the southernmost portion of central highlands region of Vietnam (Lam Dong Prov.). New to Yunnan.

Bionomics. The specimens from Hainan were collected from one slightly rotten mushroom.

Diagnosis. The specimens agree with the original description except smaller body size and sparser sensory peg setae on underside of paramere (consistent with Li et al. 2010). These differences are considered as intraspecific variation. Among the species of the borneensis group, this species can be recognized by the conspicuous coloration and the paramere ( Fig. 37 ) with rugose surface and numerous peg-setae.

Figures

FIGURES 1–6. Habitus. 1, 2—Hesperus birmanus; 3, 4—H. flexibilis; 5, 6—H. susannekontrusae. Scale bars: 1 mm.

FIGURES 13–24. Characters of Hesperus. 13–18—antennae; 19–24—head; 13, 19—H. birmanus; 14, 20—H. flexibilis; 15, 21—H. susannekontrusae; 16, 22—H. watanabei; 17, 23—H. babai; 18, 24—H. pengi. Scale bars: 1 mm.

FIGURES 35–44. Characters of Hesperus. 35–39—H. susannekontrusae; 40–44—H. watanabei; 35, 40—aedeagus in lateral view; 36, 41—aedeagus in ventral view; 37, 42—paramere; 38, 43—sternite IX of male; 39, 44—tergite X of male. Scale bars: 0.1 mm.