Xanthophius Motschulsky, 1860

Zhou, Yu-Lingzi & Zhou, Hong-Zhang, 2013, Two new species of Xanthophius Motschulsky (Coleoptera: Staphylinidae, Staphylininae, Xantholinini) from China with notes on X. filum (Kraatz), Zootaxa 3626 (3), pp. 363-380 : 364

Genus Xanthophius Motschulsky, 1860

Xanthophius Motschulsky, 1860: 75 (species included: serpentarius ); Gemminger and Harold, 1868: 607 (catalog; cited as Xanthophyus ); Duvivier, 1883: 159 (catalog; cited as Xanthophyus ); Bernhauer and Schubert, 1914: 292 (synonym of Leptacinus ); Cameron, 1932: 6 (synonym of Leptacinus ); Blackwelder, 1943: 493 (synonym of Leptacinus ; type species: serpentarius ); Blackwelder, 1952: 405 (type species: serpentarius ); Smetana, 1958: 86 (synonym of Leptacinus ); Coiffait, 1972: 134 (synonym of Leptacinus ); Smetana, 1982: 92 (synonym of Leptacinus ); Bordoni, 2002: 576 (valid genus; characters, keys to oriental species); Smetana, 2004: 698 (catalog of oriental region); Bordoni, 2005: 575 (characters; key to species from Australia); Bordoni, 2007: 76 (catalog).

Type species: Xanthophius serpentarius Motschulsky, 1860: 76 , fixed by monotypy.

Diagnosis: Xanthophius can be distinguished from all other genera within the tribe Xantholinini by the following characters ( Fig. 1 C): a) body slender and poorly sclerotized, small sized (3–4.5 mm); b) head subrectangular, with medium sized punctures on lateral parts; c) frontal furrow deep and long, anteocular furrow distinct and slightly shorter; d) labrum bilobed and with a median longitudinal groove; e) segment III of maxillary palpus longest, last segment subaciculate; segment II of labial palpus longest, last segment slender and subaciculate; f) gular sutures not fused, separated by subtriangular gular plate; g) neck medium-sized wide, shorter than 1/2 of head width; h) number of punctures in admedian row of pronotum usually 8–13; lateral row of 8–10; i) antesternal plate with median longitudinal furrow; j) superior line of hypomeron bending toward prosternum before anterior angle of pronotum, but not joining inferior line; k) protibia not dilated, with both apical ctenidium and subapical ctenidia; metatibia only with apical ctenidium; l) elytra bearing numerous rows of punctures; m) aedeagus of variable shape, with a pair of varied parameres; n) female sternite of genital segment pentagon-shaped, attached with a pair of semi-oblong supplementary sclerites ( Fig. 5 H; Fig. 6 G).

Except for X. luridipennis Bordoni and X. minor Bordoni endemic to Australia region ( Fig. 2 ), the remaining species of genus Xanthophius Motschulsky belong to the fauna of Oriental region, and are distributed along the south boundary of Tibet Plateau, and expand their distributional range toward the monsoon region of the Eastern Asia (from Indonesia through mainland China to Japan). Xanthophius benguetensis Bordoni is endemic to Philippine; X. unicidentatus sp. n. ranges north to Yangzi River, while X. angustus Sharp and X. filum (Kraatz) , are widly distributed to north of Yellow River.

Figures

FIGURE 1. Habitas and habitus of Xanthophius filum (Kraatz, 1859). A. Salix matsudana forest; B. cylindrical sound-box; C habitus in dorsal view.

FIGURE 2. Geographical distribution of species of the genus Xanthophius Motschulsky. X. gutianshanensis sp. n.); X. unicidentatus sp. n. (; X. filum (Kraatz)); X. angustus Sharp (); X. serpentarius Motschulsky (); X. benguetensis Bordoni ().

FIGURE 5. Xanthophius unicidentatus sp. n.: A. male tergite VIII; B. male sternite VIII; C. male tergite X; D. male sternite IX; E. aedeagus, ventral view; F. right paramere, dorsal view; G. endophallus at rest, ventral view; H. female genital segment. Scale bars 0.15 mm.

FIGURE 6. Xanthophius unicidentatus sp. n.: A. head; B. pronotum; C. elytra; D. aedeagus, dorsal view; E. aedeagus, ventral view; F. parameres and endophallus at rest together, ventral view; G. female genital segment. Scale bars 0.30 mm.