Horaeomorphus pengzhongi D.-Y. Zhou & S.-J. Zhang

Zhou, De-Yao, Zhang, Su-Jiong & Li, Li-Zhen, 2016, Contributions to the knowledge of the genus Horaeomorphus Schaufuss (Coleoptera, Staphylinidae, Scydmaeninae) in mainland China, ZooKeys 572, pp. 51-70 : 58-59

Taxon classification Animalia Coleoptera Staphylinidae

Horaeomorphus pengzhongi D.-Y. Zhou & S.-J. Zhang sp. n. Fig. 7

Type material

(1 ♂). Holotype: CHINA: ♂, labeled 'China: Yunnan, Baoshan City [保山市], Tengchong County [腾冲县], Mingguang Town [明光镇], Zizhi Village [自治乡], 25°18'24"N, 98°48'22"E, 1230 m, 24.vi.2013, Dai, Song& Peng leg.'.

Diagnosis.

Horaeomorphus pengzhongi can be readily separated from all other congeners by its moderately large (3.00 mm) and elongate body, sparse and fine punctation on pronotal disc and elytra, protruded metatrochanter with expansion on its ventral edge in male, parameres each with four apical setae and two subapical setae and unique structures of endophallus.

Description.

Male. BL 3.00 mm; body (Fig. 7A) large, strongly convex, reddish brown, legs and palpi slightly lighter. Head broadest at finely faceted and slightly convex eyes, HL 0.47 mm, HW 0.63 mm; tempora rounded, about as long as length of eye in dorsal view; vertex strongly transverse and weakly convex, with pair of small but distinct pits located near posterior margins of supra-antennal tubercles; frons weakly convex; supra-antennal tubercles strongly raised. Punctures on vertex and frons dense and coarse; setae moderately long, sparse. Antennae (Fig. 7B) short, AnL 1.31 mm, relative lengths of antennomeres: 1.0: 0.8: 1.8: 1.4: 1.1: 1.1: 1.0: 1.1: 1.2: 1.1: 2.2. Pronotum oval, convex, distinctly longer than wide, widest near anterior 2/5, PL 0.97 mm, PWm 0.79 mm, PWb 0.53 mm; anterior margin rounded, sides narrowing toward base; hind angles obtuse and blunt; base with 3 large and deep pits connected by narrow groove. Punctation on disc sparse and fine; dorsal surface glossy; setation moderately long. Elytra oval and elongate, moderately convex; widest near anterior 2/5, narrowing toward apices. EL 1.57 mm, EW 1.0 mm, EI 1.56. Humeral calli distinct. Punctures fine, more distinct than those on pronotum, separated by spaces 3 –4× as wide as puncture diameters; setation moderately dense. Hindwings fully developed. Metatrochanter (Fig. 7I) modified, with distal portion straight and apical 1/7 recurved, as long as half of metafemur, with expansion on ventral margin, apex rounded. Aedeagus (Fig. 7 C–E) elongate, AeL 0.53 mm; endophallus (Fig. 7 G–H) very complicated, with large bell-shaped central complex surrounded at each side by weakly sclerotized, elongate lateral structures; parameres (Fig. 7F) slender, subequal in length to median lobe, each with four apical setae and two subapical setae.

Female. Unknown.

Comments.

Horaeomorphus pengzhongi is similar to many congeners (see comments of Horaeomorphus chinensis ); the relatively larger body (3.00 mm), elongated metatrochanters each with the ventral expansion in male, each paramere with two subapical setae and structures of endophallus are clearly different and can be used to identify this new species.

Distribution.

Southern China: Yunnan.

Etymology.

This species is dedicated to Zhong Peng, one of the collectors of the type specimen.