Hesperosoma (Paramichrotus) parvioculatum, 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 (Paramichrotus) parvioculatum sp. nov.

Figures 90-95

Material examined.

Holotype. China - Hunan Prov. • ♂; glued on a card with labels as follows: " China: Hunan, Yanling County, Nanfengmian ; 26°18'10"N, 114°00'12"E; alt. 1620 m; 26 May 2014; Peng, Shen, Yu & Yan leg.; mixed forest, leaf litter, wood sifted" " Holotype / Hesperosoma (Paramichrotus) parvioculatum / Cai, Tang & Schillhammer" [red handwritten label]; SHNU . Paratypes. China - Hunan Prov. • 1♂; Yizhang County, Mang Mt. ; 24°55'39"N, 112°59'28"E; alt. 1000-1200 m; 10 May 2020; Li & Wang leg.; FIT; NMW • 1♀; same collection data as for the preceding; but 17 Jul 2020; SHNU . - Hubei Prov. • 1♂, Wufeng County, Houhe Natural Reserve ; 30°05'09"N, 110°33'05"E; alt. 1160 m; 08 Jul 2013; Dai, Peng & Xie leg.; along path in a mixed forest; bamboo; leaf litter; sifted; SHNU .

Description.

Measurements of male: BL: 10.61-13.33 mm, FL: 6.35-6.73 mm. HL: 1.58-1.79 mm, HW: 2.57-2.79 mm, EYL: 0.62-0.71 mm, TL: 0.86-0.96 mm, PL: 2.15-2.38 mm, PW: 1.95-2.11 mm, EL: 2.85-3.04 mm, EW: 2.83-3.10 mm. HW/HL: 1.48-1.63, TL/EYL: 1.35-1.39, PL/PW: 1.08-1.13, EL/EW: 0.98-1.01.

Measurements of female: BL: 13.79 mm, FL: 6.82 mm. HL: 1.83 mm, HW: 2.384 mm, EYL: 0.71 mm, TL: 0.92 mm, PL: 2.42 mm, PW: 2.07 mm, EL: 3.01 mm, EW: 3.13 mm. HW/HL: 1.30, TL/EYL: 1.30, PL/PW: 1.17, EL/EW: 0.96.

Head, pronotum and scutellum black; elytra red, with a large black patch with faint bluish hue, nearly occupying posterior two thirds, continuing on to hypomeron, but not reaching ventro-lateral margin, posterior margin and suture narrowly yellowish-red; abdomen with segments III-V reddish, VI black with anterior margin narrowly reddish, VII black with posterior margin narrowly yellowish, VIII with proximal half yellowish and distal half black, IX dark brown, X black, narrowly, obscurely reddish at base; antennae with segments 1-7 black, base and apex of segment 1, 2 and base of segment 3 reddish, segments 8-11 creamy white; mandibles dark reddish-brown; maxillary palpi reddish, labial palpi with segments 1 and 3 reddish, segment 2 black brown; legs reddish-yellow, femora reddish-brown.

Head 1.48-1.63 times as long as wide, rounded trapezoid, tempora narrowed behind eyes; dorsal surface coarsely and very densely punctate, punctures contiguous, including clypeus; antennae rather short, antennae with segments 4-7 weakly oblong, segments 8 and 10 about as long as wide.

Pronotum 1.08-1.13 times as long as wide, widest at about level of large antero-lateral seta, narrowed towards base in weak concave arc, surface with dense and coarse punctation similar to that on head, with narrow impunctate mid-line, ground pubescence slightly more obvious than that on head; scutellum uniformly, densely punctate, space between punctures with very fine wavy microsculpture.

Elytra as long as wide, along sides distinctly longer than pronotum, with slightly uneven surface, densely punctate and pubescent, with distinct depression between shoulders, scutellum and apical margin of elytra; pubescence yellow, long and dense along suture and posterior elytral margin.

Abdominal tergites III-V with transverse basal depression and pair of short oblique basal carinae, punctation very sparse and rather coarse basally and laterally, gradually becoming finer towards apical margin, tergites VI-VIII entirely with fine and uniform punctation and pubescence, colour of pubescence corresponding with colour of integument underneath; legs long and slender.

Male. Protarsomeres 1-4 moderately dilated, heart-shaped; sternite VII with the usual setose groove and patch of long yellow setae on median portion, posterior margin broadly emarginate at middle; sternite VIII with posterior margin emarginate at middle; aedeagus (Figs 92-94 ) with apex of median lobe broad, anterior margin with gibbosities at middle (ventral view); paramere (Fig. 94 ) with narrow apical portion, shorter than median lobe.

Female. Tergite X (Fig. 95 ) slightly asymmetrical with short apex.

Etymology.

The specific epithet refers to the small eyes of the new species.

Distribution.

China (Hubei and Hunan).

Diagnosis.

Externally, H. parvioculatum sp. nov. is virtually identical to H. nigricolle from Myanmar, but differs mainly, aside from the distribution, by the shape of the aedeagus: paramere with narrow apical portion (paramere with broad apical portion, distinctly bilobed in H. nigricolle ); the wider head with HW/HL about 1.48-1.63 (1.35 in H. nigricolle ); posterior angles of the head being rounded (slightly prominent in H. nigricolle ); legs reddish-yellow, femora reddish-brown (legs reddish to yellowish-red, distal halves of femora black in H. nigricolle ). In appearance, it is also similar to H. klapperichi , H. alexpuchneri , H. guizhouense and H. yunnanense , but can be distinguished from H. klapperichi , H. alexpuchneri and H. guizhouense by the larger black elytral patch, occupying more than half of the elytral disc. From H. yunnanense , it is distinguished by the smaller eyes with TL/EYL about 1.35-1.39 (1.18-1.29 in H. yunnanense ) and the wider head with HW/HL about 1.48-1.63 (1.26-1.40 in H. yunnanense ).

Figures

Figures 90 - 95. Hesperosoma parvioculatum sp. nov. 90 - 91 habitus 92 - 94 aedeagus, lateral (92) and ventral (93) views, paramere (94) 95 female abdominal tergite X. Scale bars: 2 mm (90 - 91), 0.2 mm (92 - 95).