Gabrius hong, Li, Liang, Schillhammer, Harald & Zhou, Hong-Zhang, 2010

Li, Liang, Schillhammer, Harald & Zhou, Hong-Zhang, 2010, Fourteen new species of the genus Gabrius Stephens, 1829 (Coleoptera: Staphylinidae: Philonthina) from China, Zootaxa 2572, pp. 1-24 : 14-17

8. Gabrius hong sp. n.

( Figs. 6 A–L, 7A–G)

Type material. Holotype: CHINA: Ningxia: ɗ, Liupanshan, 2050 m, 22.VI.2008, legs. Zhou Haisheng & Zhao Zongyi (IZ-CAS). Paratypes: CHINA: Ningxia: 5ɗɗ, 8ΨΨ, same data as holotype, but 2000–2050 m, 21–27.VI.2008 (IZ-CAS); CHINA: Shaanxi: 20 exs., Qin Ling Shan, mountain W pass at autoroute km 70.47, S Xi’an, 2500–2600 m, sifted (33°51’N, 108°47’E), 26–27.VIII.1995, leg. M. Schülke ( CSB, NMW); 2 exs., same as before, but leg. A. Pütz ( CSB); 2 exs., same as before, but 26–29.VIII.1995, leg. D. W. Wrase ( CSB); 7 exs., same as before, but 2300–2500 m, 26–30.VIII.1995, leg. M. Schülke ( CSB, NMW); 11 exs., same as before, but leg. A. Pütz ( CSB, NMW); 1 ex., autoroute km 93, S-Zhouzhi, 108 km SW Xi’an (33°45’N, 107°56’E), 1650 m, 1–2.IX.1995, leg. D. W. Wrase ( CSB); 1 ex., Qinling Shan, pass on rd. Zhouzhi – Foping, 105 km SW Xi’an, N-slope (33°44’N, 107°59’E), 1990 m, 2–4.VII.2001, leg. M. Schülke [C01-01] ( CSB); 1 ex., same as before, but leg. A. Smetana [C89] ( CSO); 13 exs., Daba Shan, mountain range N pass 22 km NW Zhenping, N-slope (32°01’N, 109°21’E), 2400 m, 13.VII.2001, leg. M. Schülke [C01-11] ( CSB, NMW); 5 exs., same as before, but leg. D. W. Wrase ( CSB); 10 exs., same as before, but leg. A. Smetana [C102] ( CSO, NMW); 28 exs., same as before, but 2850 m, 14.VII.2001, leg. M. Schülke [C01-12] ( CSB, NMW); 21 exs., Qinling Shan, mountain range W pass on rd. Xi’an – Shagoujie, 45 km SW-Xi’an (33°52’N, 108°46’E), 2675 m, 25.VII.2001, leg. M. Schülke [C01-20] ( CSB, NMW); 9 exs., same as before, but leg. D. W. Wrase ( CSB, NMW); 3 exs., same as before, but leg. A. Smetana [C118] ( CSO); 11 exs., same as before, but 26.VII.2001, leg. M. Schülke [C01-20A] ( CSB).

Description. Almost entirely reddish-brown, head frequently distinctly darker than pronotum. Elytra usually narrowly, indistinctly, transversely obscured in middle.

Body 5.30–6.94 mm long (HPL = 1.71–1.96 mm). Head of nearly ovoid shape, somewhat narrowed posteriad, 0.65–0.82 mm long, 0.65–0.73 mm wide, slightly longer than wider (HW:HL = 0.80–1.00). Tempora 0.41–0.49 mm long, almost evenly rounded, sparsely and largely punctate, setiferous; eyes very small, flat, 0.16–0.25 mm long, 0.33–0.60 times as long as tempora. Dorsal surface of head with scattered, variably large setiferous punctures along lateral sides, vertex largely impunctate; entire head with distinct and profound microsculpture of oblique waves. Antennae moderately long, 1st segment very long, thickened towards apex, 3rd segment almost as long as 2nd, 4th–5th segments almost as long as wide, 6th–10th segments distinctly transverse, last segment distinctly longer than wide, obliquely truncated.

Pronotum subparallel-sided, slightly narrowed anteriad and posteriad, 0.82–0.90 mm long, 0.65–0.73 mm wide, almost as wide as head (PW:HW = 0.89–1.13), dorsal rows each with six punctures; entire surface with microsculpture similar to that on head.

Elytra moderately long, slightly widened posteriad, 0.82–0.90 mm long, 0.98–1.06 mm wide, along sides 0.90–1.10 times as long as pronotum (in most specimens shorter than), densely and finely punctate, punctures separated by 1–2 times their diameter. Scutellum moderately large, triangular, densely and finely punctate and pubescent.

Abdomen slightly narrowed posteriad, widest 0.98–1.06 mm, finely and closely punctate, punctures separated by less than one puncture diameter at base, gradually becoming sparser toward apex of each tergite; surface between punctures with exceedingly fine and dense microsculpture of transverse striae; tergites III–V with two basal lines, elevated area between basal lines impunctate.

Male. Sternite VIII with wide, moderately deep, triangular medio-apical emargination, filled by semimembranous extension ( Fig. 7 E). Genital segment with styli of tergite IX simple, moderately setose apically. Sternite IX largely membranous at medio-apical portion, basal portion narrow and moderately long, more or less symmetrical, apical portion split apically into two pubescent lobes ( Fig. 7 D). Tergite X simple, triangular, subtruncated at apex ( Fig. 7 F).

Aedeagus with median lobe broadest approximately at level of apex of paramere, apical portion triangular, narrowed into obtusely rounded apex ( Fig. 7 A); in lateral view, apical portion distinctly bent dorsad ( Fig. 7 B); paramere much shorter than median lobe, apical margin bisinuate, with shallow, triangular medial emargination, face adjacent to median lobe with sensory peg setae, closely arranged along apical margin of paramere ( Fig. 7 C), both median lobe and paramere are slightly variable.

Female. Sternite VIII arcuate at apex, without medio-apical emargination. Genital segment with styli of tergite IX similar to that of male. Tergite X with slightly emarginate apex ( Fig. 7 G).

Remarks. The new species belongs to the G. astutus group; because of the genital characters and the characteristic shape of the male sternite IX. Due to the very short elytra and reddish color, it may not be confused with any known species of that group.

Distribution. The species is at present known only from China (Ningxia and Shaanxi).

Etymology. The specific epithet is derived from the Chinese word hong (red), and refers to the almost entirely reddish-brown body.

Figures

FIGURE 6. Scanning electron micrographs of Gabrius hong sp. n. A, prototergal glands (osmeteria); B, scutellum, showing two carina (arrows); C, cuticle of mesotergite; D, pronotal hypomeron, ventral view; E, prosternum, showing mid-longitudinal carina (arrow); F, mentum and labial palpi, showing one anterolateral seta on each side (arrow); G, mesosternum, showing transverse carina (arrow); H, metasternum and hind coxae, showing transverse carina (arrow); I, sternite III, showing basal line (arrow); J, last segment of maxillary palpus; K, tergites III – V, showing two basal lines (arrows); L, neck, showing nuchal ridge and dorsal basal ridge (arrows).

FIGURE 7. Gabrius hong sp. n. A, aedeagus, ventral view; B, median lobe of aedeagus (paramere removed), lateral view; C, underside of paramere; D, sternite IX of male; E, sternite VIII of male; F, tergite X of male; G, tergite X of female. Gabrius instrigatus sp. n. H, aedeagus, ventral view; I, median lobe of aedeagus (paramere removed), lateral view; J, underside of paramere; K, sternite IX of male; L, sternite VIII of male. Scale bars 0.5 mm