Hesperosoma (s.str.) motuoense, Cai 1 & Tang 1 & Schillhammer 2, 2021

Cai 1, Yu-Jie, Tang 1, Liang & Schillhammer 2, Harald, 2021, A review of the genus Hesperosoma Scheerpeltz (Coleoptera, Staphylinidae, Staphylininae) of China, ZooKeys 1075, pp. 137-174 : 137

Hesperosoma (s.str.) motuoense sp. nov.

Figures 41-46

Material examined.

Holotype. China - Xizang Prov. • ♂; glued on a card with labels as follows: " China: Xizang A. R., Motuo County, Hanmi ; alt. 2100 m; 23 Aug 2011; Wen-Xuan Bi leg." " Holotype / Hesperosoma (s.str.) motuoense / Cai, Tang & Schillhammer" [red handwritten label]; SHNU . Paratypes. China - Xizang Prov. • 3♂♂; Motuo County, 80k; alt. 2100 m; 24 Aug 2011; Wen-Xuan Bi leg.; SHNU, NMW • 2♀♀; same locality, but 11 Aug 2013, Wen-Xuan Bi leg.; SHNU, NMW • 2♂♂; same locality, but 11 Aug 2013; Wen-Xuan Bi leg.; SHNU • 1♀; same locality, but 22 Jul 2013; Wen-Xuan Bi leg.; SHNU • 1♂; Zhucun-Bangxin ; alt. 1850 m; 26 Aug 2013; Wen-Xuan Bi leg.; SHNU .

Measurements.

Male: BL: 10.54-14.54 mm, FL: 6.12-7.25 mm. HL: 1.77-2.07 mm, HW: 2.11-2.68 mm, EYL: 0.64-0.75 mm, TL: 0.83-1.05 mm, PL: 2.00-2.45 mm, PW: 1.77-2.19 mm, EL: 2.75-3.21 mm, EW: 2.75-3.28 mm. HW/HL: 1.19-1.34, TL/EYL: 1.25-1.44, PL/PW: 1.11-1.15, EL/EW: 0.94-1.00.

Female: BL: 13.23-15.49 mm, FL: 7.10-7.40 mm. HL: 1.96-2.07 mm, HW: 2.34-2.45 mm, EYL: 0.75-0.79 mm, TL: 0.94-1.02 mm, PL: 2.41-2.45 mm, PW: 2.07-2.15 mm, EL: 3.17-3.40 mm, EW: 3.25-3.40 mm. HW/HL: 1.16-1.20, TL/EYL: 1.25-1.29, PL/PW: 1.14-1.18, EL/EW: 0.96-1.00.

Head and pronotum brilliant metallic green to bluish-green, elytra brighter metallic green, bluish-green at shoulders, along sides and at posterolateral angles; abdomen with segments III-V reddish (in one specimen, abdomen with segments III-V reddish, medio-posterior portion darkened on segments IV and V), segments VI-VII dark brown, but segment VII with apical portion broadly yellow, segments VIII-IX entirely pale yellow; antennae with segments 1-6 black, base of segment 2 reddish, segments 7-11 creamy white; mandibles reddish with narrowly darkened medial and lateral margins; palpi dark reddish-brown with paler reddish tips; legs reddish-brown.

Head 1.16-1.34 times as wide as long, rounded trapezoid, tempora narrowed behind eyes; surface with moderately dense, simple punctation, punctures separated by about 1-2 puncture diameters in transverse direction; narrow anterior portion of frons impunctate; narrow impunctate mid-line extending from frons posteriad to mid-length; pubescence brownish; antennae with segments 4-7 markedly oblong, segments 8 and 9 slightly oblong, segment 10 about as long as wide.

Pronotum 1.11-1.18 times as long as wide, widest at about level of large lateral seta, narrowed towards base in distinct concave arc; punctation of surface similar to that of head, with narrow impunctate mid-line; scutellum densely furnished with pit-like punctures, but punctures, although almost contiguous, well isolated.

Elytra 0.94-1.00 times as long as wide, surface slightly uneven, with distinct depression between shoulders, scutellum and apical margin of elytra, along suture slightly elevated; punctation dense, but punctures not contiguous, separated by less than a puncture diameter in transverse direction; pubescence yellow, long and dense along suture and posterior elytral margin.

Abdominal tergites III-V with basal transverse depression; punctation of abdominal tergites III-V pit-like at base, gradually becoming finer towards apical margin, pit-like punctures occupying more than basal half on tergite III, about basal half on tergite IV and about basal third on tergite V; abdominal tergites VI-VIII with punctures similar in size, interstices smooth.

Male. Protarsomeres 1-4 moderately dilated, heart-shaped; sternite VII with patch of long yellow setae on median portion, posterior margin broadly emarginate at middle; sternite VIII with posterior margin emarginate at middle; aedeagus (Figs 43-45 ) with median lobe and paramere slightly asymmetrical, paramere (Fig. 45 ) shorter than median lobe and medio-apically emarginate.

Female. Tergite X (Fig. 46 ) slightly asymmetrical with posterior margin projecting at middle.

Etymology.

The species is named after the type locality.

Distribution.

China (Xizang).

Diagnosis.

Externally, the species hardly differs from H. mishmiense Schillhammer, 2004 from India, but may be distinguished by the shape of the aedeagus (Figs 43-45 ): median lobe (lateral view) in H. motuoense sp. nov. broader than in H. mishmiense , paramere in H. motuoense sp. nov. with shallower medio-apical emargination.

Figures

Figures 41 - 46. Hesperosoma motuoense sp. nov. 41 - 42 habitus 43 - 45 aedeagus, lateral (43) and ventral (44) views, paramere (45) 46 female abdominal tergite X. Scale bars: 2 mm (41 - 42), 0.2 mm (43 - 46).