Paederus daicongchaoi Peng

Li, Qi-Li, Li, Li-Zhen, Gu, Fuang-Kang & Peng, Zhong, 2016, New data on brachypterous Paederus (Coleoptera, Staphylinidae) of mainland China, Zootaxa 4184 (3), pp. 576-588: 577

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Paederus daicongchaoi Peng


Paederus daicongchaoi Peng  and L.-Z. Li, new species

( Figs 1View FIGURE 1 A, 1D, 2)

Type material. HOLOTYPE: Ƌ, labeled ‘ China: Anhui Prov., Yuexi County, Yaoluoping, Duozhijian , 30°58'383'' N 116°09'59'' E, 1650 m, 19.VI.2013, Peng & Dai leg.’ ( SNUC)  . Paratypes: 1 ♀, same label data as holotype (SNUC).

Description. Measurements (in mm) and ratios: BL: 8.95–9.62; FL: 4.23–4.45; HL: 1.29–1.32; HW: 1.50– 1.51; AnL: 2.97–3.14; PL: 1.51–1.59; PW: 1.51–1.55; EL: 0.91–0.93; EW: 1.52–1.59; AW: 1.78–1.81; AL: 2.08; HL/HW: 0.86–0.87; HW/PW: 0.97–0.99; HL/PL: 0.83–0.85; PL/PW: 1.00–1.02; EL/PL: 0.58–0.60; diameter of eye: 0.38–0.43.

Habitus as in Fig. 1View FIGURE 1 A. Coloration: head and labrum black, labial palpi and antennae yellowish brown; pronotum brownish red; elytra metallic-blue; legs yellowish brown; abdomen bicoloured with segments III-VI brownish red and segments VII-X black.

Head wider than long, widest across eyes; punctation coarse and sparse; interstices glossy. Eyes distinctly convex. Antenna as in Fig. 1View FIGURE 1 D.

Pronotum nearly oviform, strongly convex in cross-section; punctures sparser and somewhat shallower than those of head.

Elytra trapeziform; punctation coarse, defined and dense. Hind wings reduced. Metatarsomere I as long as combined length of metatarsomeres II and III.

Abdomen distinctly broader than elytra; punctation moderately coarse; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe.

Male. Labrum ( Fig. 2View FIGURE 2 D) with deeply excavate anterior margin. Posterior margin of tergite VIII ( Fig. 2View FIGURE 2 E) broadly convex; sternite VII unmodified; sternite VIII ( Fig. 2View FIGURE 2 F) with deep posterior incision, this incision approximately 0.5 times as long as sternite VIII; aedeagus as in Figs 2View FIGURE 2 G –I; dorsal plate broad; parameres asymmetric and slender; internal sac with three strongly sclerotized spines of characteristic shapes.

Female. Labrum as in Fig. 2View FIGURE 2 A. Posterior margin of tergite VIII ( Fig. 2View FIGURE 2 B) convex; posterior margin of sternite VIII ( Fig. 2View FIGURE 2 C) strongly convex.

Comparative notes. Based on the structure of the aedeagus, this species is allied to P. describendus Willers, 2001  (Zhejiang: Tianmu Shan), from which it is distinguished by the somewhat stouter pronotum, the deeply excavate anterior margin of the male labrum, the longer parameres and three strongly sclerotized spines in the internal sac of the aedeagus and particularly the shape of the female sternite VIII. For illustrations of P. describendus  see Willers (2001b: figures 9–12).

Distribution and natural history. The type locality is in the Yaoluoping to the northwest of Yuexi, western Anhui. The specimens were sifted from leaf litter from the floor of a pine forest at an altitude of 1650 m.

Etymology. The species is named after Cong-Chao Dai, the first author’s bosom friend, who collected the type specimens.