Craspedomerus zhangi Li & Zhou

Li, Liang & Zhou, Hong-Zhang, 2010, Taxonomy of the genus Craspedomerus Bernhauer, 1911 (Coleoptera: Staphylinidae: Philonthina) from China, Zootaxa 2506, pp. 1-25 : 9-11

3. Craspedomerus zhangi Li & Zhou sp. n.

( Figs. 5 A–E, 12E)

Type material. Holotype: CHINA: Tibet: ɗ, Mêdog (29°42´N, 95°56´E), 2765 m, 26.VIII.2006, Liang Hongbin collected (IZ-CAS); Paratypes: CHINA: Tibet: 2ΨΨ, same data as holotype (IZ-CAS); Ψ, Bomi (29°48´N, 95°41´E), 3650 m, 28.VIII.2006, Liang Hongbin & Bai Ming collected (IZ-CAS).

Description. Head and pronotum black with slightly bronze-green reflex. Antennae black with 8th–10th segments yellow, last segment black-brown. Elytra purple with shoulders, posterior margins and suture markedly reddish-yellow. Scutellum black. Abdomen black with strongly iridescent reflex, posterior half of tergite VII and entire tergites VIII–X reddish-yellow. Mandibles dark brown. Maxillary and labial palpi and legs reddish-brown.

Body moderately large, 10.8–14.8 mm long (HPL = 4.33–4.74 mm). Head of rounded quadrangular shape, 1.88–1.96 mm long, 2.04–2.29 mm wide, slightly wider than long (HW:HL = 1.09–1.13). Tempora 0.65–0.81 mm long, almost evenly rounded, densely and coarsely punctate, setiferous. Eyes moderately large, slightly protruded, 0.57–0.74 mm long, 0.78–0.90 times as long as tempora. Dorsal surface of head with moderately numerous, large setiferous punctures, becoming sparser toward vertex, vertex largely impunctate; entire head with distinct and profound microsculpture of oblique, long waves.

Pronotum subquadrate, slightly narrowed anteriad, 2.29–2.45 mm long, 2.12–2.29 mm wide, slightly wider than head (PW:HW = 1.00–1.10), sparsely and finely punctate, punctures separated by 4–7 times their diameter, narrowly impunctate along midline, microsculpture fine, similar to that on head.

Elytra 2.69–3.02 mm long, 2.94–3.43 mm wide, 1.18–1.30 times as long as pronotum, densely and finely punctate, punctures separated by 2–3 times their diameter. Scutellum large, triangular, densely and finely punctate.

Abdomen a little narrowed posteriad, widest 2.45–2.69 mm; tergites densely and finely punctate, at base punctures separated by 2–3 times their diameter, gradually becoming sparser toward apex of each tergite, surface between punctures with dense and fine microsculpture of transverse striae; elevated area between basal lines of tergites III–V almost impunctate.

Male. Sternite VIII with moderately wide, obtusely triangular medio-apical emargination ( Fig. 5 D). Sternite IX with distinctly asymmetrical basal portion, apex deeply emarginate, each lobe bearing two long apical setae ( Fig. 5 C). Genital segment with styli of tergite IX simple, densely setose apically. Tergite X simple, triangular, subrounded at apex, with variable number of apical setae ( Fig. 5 E).

Aedeagus as ( Figs. 5 A–B); underside of each branch of paramere with very small, pointed sensory peg setae arranged at subapical portion ( Fig. 12 E).

Female. Sternite VIII without medio-apical emargination. Gonocoxites moderately developed, second gonocoxites each with minute stylus bearing two long apical setae. Tergite X similar to that of male.

Remarks. Craspedomerus zhangi can be easily distinguished from all congeners by elytra purple with shoulders, posterior margins and suture markedly reddish-yellow and quite characteristic shape of sensory peg setae.

Distribution. The species is at present known only from China (Tibet).

Etymology. The species is named in honor of Dr. Luping Zhang, College of Life Sciences, Hebei Normal University, China.

Figures

FIGURE 5. Craspedomerus zhangi Li & Zhou sp. n. A, aedeagus, ventral view; B, aedeagus, lateral view; C, sternite IX of male; D, sternite VIII of male; E, tergite X of male. Scale bars 1 mm.

FIGURE 12. Scanning electron micrographs of the underside of one of the branches of the paramere of Craspedomerus. A, C. sinetuber (Coiffait); B, C. glenoides (Schubert); C, C. beckeri Bernhauer; D, C. violaceipennis Cameron; E, C. zhangi Li & Zhou sp. n.; F, C. giganteus Li & Zhou sp. n.; G, C. ganeshensis Coiffait; H, C. gongshanus Li & Zhou sp. n.; I, C. cyanipennis Scheerpeltz. Sensory peg setae are indicated with arrows.