Doryloxenus yunnanus, Assing, 2009

Assing, V., 2009, New species and additional records of Homalotini, Athetini, Pygostenini, and Lomechusini from Yunnan, China (Coleoptera: Staphylinidae: Aleocharinae), Linzer biologische Beiträge 41 (1), pp. 485-507 : 501-503

Doryloxenus yunnanus nov.sp. ( Figs 48-52 )

Holotype Ƌ: China: Yunnan [ CH 07-11A], Baoshan Pref., Gaoligong Shan nr. Xiaoheishan N. R., 35 SE Tengchong, 2110 m, 24°50'16"N, 98°45'43"E, decid. forest, fungi, sifted, 4. VI.2007, leg. A. Pütz / Holotypus Ƌ Doryloxenus yunnanus sp.n. det. V. Assing 2009 (cPüt).

D e s c r i p t i o n: 2.8 mm. Habitus as in Fig. 48 . Coloration of whole body darkreddish; abdominal apex and apical antennomeres reddish-yellow.

Forebody shaped as in Fig. 48 , glabrous, with very sparse and fine punctation; interstices without microsculpture. Pronotum 1.45 times as wide as long and twice as wide as head. Elytra 0.58 times as long as pronotum.

Abdomen wedge-shaped, distinctly tapering posteriad; tergite II only at posterior margin with one row of approximately 15 marginal punctures each bearing a long yellowish seta, otherwise impunctate, except for very fine micropunctation; tergite III with setiferous punctures only in posterior 1/3, at posterior margin with row of very long marginal setae, submarginal setae distinctly shorter, anterior 2/3 only with micropunctation; tergites IV- VI punctate on whole surface, at posterior margin with row of long yellowish marginal setae, on remainder of tergal surface with distinctly shorter setae; posterior margin of tergite VI broadly concave; posterior margin of tergite VII with palisade fringe.

Ƌ: tergite VIII, sternite VIII, and segments IX-X shaped as in Figs 49-51 ; median lobe of aedeagus as in Fig. 52 .

♀: unknown.

E t y m o l o g y: The name (adjective) alludes to the fact that this is presently the only described representative of the genus known from Yunnan.

C o m p a r a t i v e n o t e s: Only three species of Doryloxenus WASMANN 1898 have become known from the Palaearctic region, one from Nepal ( D. nepalensis NAOMI 1996 ) and two from Hong Kong ( D. hongkongensis PACE 1998 and D. rougemonti PACE 1998 ). The two species from Hong Kong are readily distinguished from D. yunnanus by their smaller size alone (1.7 and 2.1 mm, respectively). In addition, D. hongkongensis is separated from the new species by the differently shaped median lobe of the aedeagus; the male sexual characters of D. rougemonti are unknown. The same is true of D. nepalensis , whose description is based on a single female and which is distinguished from D. yunnanus by smaller size (1.9 mm) and a less slender body. For illustrations of these species see NAOMI (1996) and PACE (1998c).

D i s t r i b u t i o n a n d b i o n o m i c s: The type locality is situated in the Gaoligong Shan, to the southeast of Tongcheng in western Yunnan province. Species of

Doryloxenus are generally associated with army ants ( KISTNER 1975). The holotype was sifted from leaf litter and fungi in a deciduous forest at an altitude of 2110 m.

Figures

Figs 48-52: Doryloxenus yunnanus nov.sp.: (48) habitus; (49) male tergite VIII; (50) male sternite VIII; (51) abdominal segments IX-X; (52) median lobe of aedeagus in lateral view. Scale bars: 48: 1.0 mm; 49-52: 0.2 mm.