Hesperus watanabei Shibata, 2002

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 : 554

Hesperus watanabei Shibata, 2002

(Chinese name: âȕ刃Ḇdzûà)

( Figs 7, 8 , 16, 22 , 40–44)

Hesperus watanabei Shibata, 2002: 255 ; Li, Zhou & Schillhammer, 2010: 535.

Material examined. China: Yunnan: 1♂ 11♀♀, Lianghe County, Mengyang Town , 24°33′28.97″N, 98°16′11.41″E, alt. 550–1633m, VI –XI.2022; Lin Yicheng leg. ( SHNU); 1♂, Lincang City, Man-wan Town, Datianwazi , 24°41′26.75″N, 100°20′44.87″E, alt. 2000m, 10. V .2016, Xiong Zi-Chun leg. ( SHNU); 1♀, Tengchong County, Mingguang Town, Zizhi Vill. , 25°42′N, 98°35′E, alt. 2300–2500m, 30.IV.2013, S.-D.-P. leg. ( SHNU) .

Redescription. Measurements of male: BL: 10.91–14.23 mm, FL: 5.95–6.38 mm. HL: 1.52–1.64 mm, HW: 2.70–2.98 mm, EYL: 0.76–0.77 mm, TL: 0.65–0.78 mm, PL: 2.02–2.17 mm, PW: 2.17–2.26 mm, EL: 2.88–3.07 mm, EW: 3.19–3.32 mm. HW/HL: 1.78–1.81, TL/EYL: 0.84–1.03, PL/PW: 0.93–0.96, EL/EW: 0.90–0.92.

Measurements of female: BL: 11.25–11.34 mm, FL: 6.29–6.69 mm. HL: 1.45–1.55 mm, HW: 2.13–2.35 mm, EYL: 0.71–0.83 mm, TL: 0.55–0.58 mm, PL: 2.20–2.29 mm, PW: 2.13–2.35 mm, EL: 3.13–3.41 mm, EW: 3.22– 3.59 mm. HW/HL: 1.47–1.52, TL/EYL: 0.70–0.78, PL/PW: 0.97–1.03, EL/EW: 0.95–0.97.

The characters of adult are provided in the original description based on six males and one female specimen ( Shibata 2002). Therefore, only additional measurements are provided above.

Distribution. This species is only known from Yunnan province, southwestern China.

Diagnosis. Hesperus watanabei may be easily recognized from the species of other borneensis group except H. flexibilis by the head, neck, pronotum, elytra and segments III–VI orange red, and by creamy white antennomeres 9–11 ( Fig. 16 ). For distinguishing Hesperus watanabei from H. flexibilis , see description of the latter species.

Figures

FIGURES 7–12. Habitus. 7, 8—Hesperus watanabei; 9, 10—H. babai; 11, 12—H. pengi. 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.