Craspedomerus gongshanus 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 : 6-9

2. Craspedomerus gongshanus Li & Zhou sp. n.

( Figs. 4 A–E, 12H)

Type material. Holotype: CHINA: Yunnan: ɗ, Gongshan (27°42´N, 98°30´E), 2770 m, 3.V.2002, Liang Hongbin collected (IZ-CAS). Paratypes: CHINA: Yunnan: ɗ, same data as holotype (IZ-CAS); 2ɗɗ, 5ΨΨ, same data as holotype, but 2200–2770 m, 12–30.IV.2002 (IZ-CAS); ɗ, Gaoligongshan (25°59´N, 98°37´E), 2000 m, 9–14.VII.2000, Liang Hongbin collected (IZ-CAS).

Description. Head and pronotum black with bronze-green reflex. Antennae black-brown with last three or four segments sometimes pale. Elytra metallic blue or violaceous. Scutellum black. Abdomen black with strongly iridescent reflex, tergite VII with posterior 1/2–4/5 portion and entire tergites VIII–X reddish-yellow, styli of tergite IX dark-brown. Mandibles dark brown. Maxillary and labial palpi reddish-brown. Femora and tibiae black or black-brown, tarsi reddish-brown.

Body moderately large, 12.4–13.1 mm long (HPL = 4.08–4.32 mm). Head of rounded quadrangular shape, 1.63–1.88 mm long, 1.88–2.12 mm wide, slightly wider than long (HW:HL = 1.13–1.20). Tempora 0.57–0.74 mm long, almost evenly rounded, densely and coarsely punctate, setiferous; eyes moderately large, slightly protruded, 0.57–0.65 mm long, 0.78–0.89 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 transverse, long waves.

Pronotum subquadrate, slightly narrowed anteriad, 2.12–2.37 mm long, 2.12–2.29 mm wide, slightly wider than head (PW:HW = 1.08–1.17), sparsely and finely punctate, punctures separated by 5–8 times their diameter, narrowly impunctate along midline, surface with distinct and profound microsculpture of oblique, long waves.

Elytra 2.78–3.10 mm long, 2.86–3.27 mm wide, 1.20–1.31 times as long as pronotum, densely and finely punctate, punctures separated by 1–2 times their diameter. Scutellum large, triangular, densely and finely punctate.

Abdomen a little narrowed posteriad, widest 2.45–2.86 mm, tergites sparsely and finely punctate, at base punctures separated by 3–4 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. 4 D). Sternite IX with distinctly asymmetrical basal portion, apex deeply emarginate, each lobe bearing two long setae ( Fig. 4 C). Tergite X simple, triangular, subrounded at apex, with variable number of apical setae ( Fig. 4 E).

Aedeagus as ( Figs. 4 A–B); underside of each branch of paramere with flat sensory peg setae more or less regularly arranged into two rows at subapical portion ( Fig. 12 H).

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 gongshanus is similar to C. sinetuber and C. giganteus in having elytra metallic blue or violaceous and antennae black-brown. Craspedomerus gongshanus differs from C. sinetuber by posterior 1/2–4/5 portion of tergite VII and entire tergites VIII–X reddish-yellow (abdomen entirely black in the latter species), distinctly smaller eyes (0.78–0.89 times as long as tempora in the new species vs. 1.30– 1.60 times in C. sinetuber ) and different arrangement of sensory peg setae on the underside of paramere ( Figs. 12 A, H). Craspedomerus gongshanus is different from C. giganteus by distinctly smaller body (HPL = 4.08– 4.32 mm vs. HPL = 5.47–5.71 mm, respectively), pronotum with profound microsculpture of oblique, long waves (with profound microsculpture of mesh in C. giganteus ) and different number and arrangement of the sensory peg setae on the underside of paramere ( Figs. 12 F, H).

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

Etymology. The species name refers to the name of the type locality, Gongshan.

Figures

FIGURE 4. Craspedomerus gongshanus 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.