Xanthophius Motschulsky

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 : 367

Key to species of the genus Xanthophius Motschulsky

1 Number of punctures in lateral row on pronotum 5–6; endophallus (inner sac) not curved or coiled ( Bordoni, 2005: Fig. 294); New South Wales........................................................................ X. minor Bordoni

- Number of punctures in lateral row on pronotum more than 6…................................................. 2

2 Head of triangular shape, posterior angle widely rounded; endophallus bearing umerous small spines ( Bordoni, 2002: Fig. 1712); Philippine................................................................... X. benguetensis Bordoni

- Head of subrectangular shape, posterior angle rounded or slightly rounded........................................ 3

3 Microsculpture on abdomen of polygonal reticulum; endophallus of spiral shaped. and wholly spinulate ( Bordoni, 2002: Fig. 1703); East Asia........................................................................ X. angustus Sharp

- Microsculpture on abdomen of microstriae; or of no microsculpture.............................................. 4

4 Posterior margin of male abdominal tergite VIII with a median protruding lobe; endophallus with two large central spines ( Bordoni, 2002: Fig. 1700); Southeast Asia........................................... X. serpentarius Motschulsky

- Posterior margin of male abdominal tergite VIII not distinctly protruding......................................... 5

5 Paramere with a denticle in the middle of inner side; endophallus bearing more dark and large spines in apical 2/3 portion ( Fig. 6 F); Southeast China.................................................................. X. unicidentatus sp. n.

- Paramere without any denticle in inner side................................................................. 6

6 Endophallus of corkscrew shape, with solid, large, curved sclerite in basal part..................................... 7

- Endophallus of sac shape, bearing numerous smaller spines; paramere with semicircle concave on inner edge ( Bordoni, 2005: Fig. 290); Australia.................................................................. X. luridipennis Bordoni

7 Number of basal spines on endophallus four pairs ( Fig. 9 ); Southeast Asia........................... X. filum (Kraatz)

- Number of basal spines on endophallus five pairs ( Fig. 4 E); Zhejiang Prov...................... X. gutianshanensis sp. n.

Figures

FIGURE 4. Xanthophius gutianshanensis sp. n.: A. head; B. pronotum; C. elytra; D. aedeagus, ventral view; E. dissected endophallus with scattered bs; F. endophallus everting, lateral view. Scale bars 0.30 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.

FIGURE 9. Sclerotized structures of everted endophallus of Xanthophius filum (Kraatz). A. from ventral view; B. from dorsal view.