Gabrius extraneus Li, Schillhammer & Zhou, 2010, sp. n.
Creators: name: Li, Liang
name: Schillhammer, Harald
name: Zhou, Hong-Zhang
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Gabrius
Gabrius extraneus

description: 7. Gabrius extraneus sp. n.
(Fig. 5 E–G)
Type material. Holotype: CHINA: Beijing: ɗ, Xiaolongmen: Liyuanling, 1070 m, 13.V.2000, leg. Yu Xiaodong (IZ-CAS). Paratype: CHINA: Shanxi: ɗ, Li Shan, SE-slopes of Shunwangping (35°24’N, 111°58’E), 1800–2200 m, 4.VII.2006, leg. J. Turna (NMW).
Description. Head and pronotum black, shining. Antennae reddish-brown. Elytra balck-brown. Abdomen black with feebly blue reflex, posterior margin of each tergite narrowly reddish-brown. Mandibles, maxillary and labial palpi and legs reddish-brown.
Body 6.53 mm long (HPL = 2.20 mm). Head of rounded quadrangular shape, 0.90 mm long, 0.65 mm wide (HW: HL = 0.73). Tempora 0.41 mm long, almost evenly rounded, sparsely and coarsely punctate; eyes small, slightly protruding, 0.25 mm long, 0.60 times as long as tempora. Dorsal surface of head with scattered, large setiferous punctures along lateral sides, vertex largely impunctate; entire head with distinct and profound microsculpture of transverse waves. Antennae moderately long, 1st segment long, slightly thickened towards apex, 3rd segment slightly longer than 2nd, 4th–5th segments longer than wide, 6th segment almost as long as wide, 7th–10th segments distinctly transverse, last segment slightly longer than wide, obliquely truncated.
Pronotum slightly narrowed anteriad, 1.22 mm long, 0.98 mm wide, distinctly wider than head (PW:HW = 1.50); dorsal rows each with five punctures, sublateral rows each with two punctures; entire surface with microsculpture similar to that on head.
Elytra 1.55 mm long, 1.39 mm wide, along sides 1.27 times as long as pronotum, sparsely and finely punctate, punctures separated by 4–5 times their diameter. Scutellum large, triangular, sparsely and finely punctate and pubescent.
Abdomen slightly narrowed posteriad, widest 1.31 mm, uniformly and densely punctate, punctures separated by 2–3 times their diameter; surface between punctures with exceedingly fine and dense microsculpture of transverse striae; tergites III–V with two basal lines, elevated area between basal lines almost impunctate.
Male. Sternite VIII with shallow, almost acutangular medio-apical emargination filled by extensive semimembranous extension and dense row of long and stiff setae along apical margin; tergite VIII with very narrow medio-apical notch, notch bordered by two short and acute processes.
Aedeagus moderately large; median lobe long, distinctly exceeding paramere, apical portion slender, characteristically shaped (Fig. 5 F); in lateral view, apical portion distinctly bent dorsad, subtruncated at apex (Fig. 5 G); paramere entire, with triangular apical portion, face adjacent to median lobe with sensory peg setae closely arranged along apical margin of paramere (Fig. 5 E).
Female. Unknown.
Remarks. The species belongs to the Gabrius osseticus group. Externally, it is most similar to G. insignis (Luze, 1904) and G. mandschuricus (Bernhauer, 1914). It differs from G. insignis by the more robust pronotum with distinct microsculpture (indistinct and partly obsolete in G. insignis) and from G. mandschuricus by the impunctate elevated area between two basal lines on first three visible tergites. It differs from both by the completely different aedeagus.
Distribution. The species at present known only from Eastern China (Beijing, Shanxi).
Etymology. The specific epithet is derived from the Latin word extrane- (strange), and refers to the strange shape of the aedeagus.
description: Published as part of Li, Liang, Schillhammer, Harald & Zhou, Hong-Zhang, 2010, Fourteen new species of the genus Gabrius Stephens, 1829 (Coleoptera: Staphylinidae: Philonthina) from China, pp. 1-24 in Zootaxa 2572 on pages 13-14, DOI: 10.5281/zenodo.197419