Gabrius Stephens, 1829

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 : 2

Genus Gabrius Stephens, 1829

Stephens, 1829: 23 (genus description); Westwood, 1838: 16 (type species); Cameron, 1932: 62 (subgenus of Philonthus ); Coiffait, 1974: 17 (key to species of western Palaearctic region); Smetana, 1984 (review of and key to species of Japan); Schillhammer, 1997 (revision of and species groups for species of Oriental region, checklist of world species); Cho and Lee, 1997: 272 (key to species of Korea); Herman, 2001: 2582 (world catalog); Smetana, 2004: 633 (catalog for Palaearctic region).

Type species: Staphylinus aterrimus Gravenhorst; 1802 (= Staphylinus nigritulus Gravenhorst, 1802 ), subsequent designation by Westwood, 1838.

Diagnosis. The genus Gabrius may be easily recognized by the combination of the following characters: last segment of maxillary palpus fusiform ( Fig. 6 J), longer than penultimate segment; last segment of labial palpus distinctly narrower than penultimate segment ( Fig. 6 F); first four segments of front tarsus in both sexes simple, not dilated, without modified pale setae ventrally; superior line of pronotal hypomeron not turning downwards until close to front angle, so that lateral puncture of pronotum bearing long seta situated close to it and separated from it by distance not larger than one diameter of puncture ( Fig. 6 D); abdomen with tergites III–V or III–VI bearing two basal lines ( Fig. 6 K); basal line of sternite III arcuately extended posteriad in middle ( Fig. 6 I); medio-apical emargination of male sternite VIII usually filled by semi-membranous extension; sternite IX of male genital segment with proximal portion more or less symmetrical (except G. fimetarioides group), and distal portion usually variably modified.

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).