Zyras (Zyras) fansipanicus, Assing & V, 2015

Assing, Volker & V, North, 2015, On the Lomechusini fauna of Vietnam (Coleoptera: Staphylinidae: Aleocharinae), Linzer biologische Beiträge 47 (2), pp. 1257-1282 : 1276-1278

Zyras (Zyras) fansipanicus nov.sp. ( Figs 15-18 , 33-34 , 62 )

T y p e m a t e r i a l: Holotype 3: "N-Vietnam - 7 km NW Sa Pa, 22°22'47''N, 103°47'10''E, 1850 m, decid. forest, 31.VII.2013, V. Assing [5+2] / Holotypus 3 Zyras fansipanicus sp. n., det. V. Assing 2015" (cAss). Paratype ♀: "N-Vietnam - pass 8 km NW Sa Pa, 22°21'10''N, 103°46'01''E, 2010 m, second. forest, 12.VIII. 2013, V. Assing [7b+2]" (cAss).

E t y m o l o g y: The specific epithet is an adjective derived from Fansipan, the highest peak of Vietnam, near which the type locality is situated.

D e s c r i p t i o n: Rather large species; body length 7.0-8.0 mm; length of forebody 3.4-3.7 mm. Coloration: head and pronotum blackish; elytra bicoloured, with the anterior third to two-fifths and the suture reddish-yellow and the posterior portion extensively blackish; abdomen blackish, with the paratergites and the posterior margins of segments III-VI narrowly, those of segments VII and VIII more broadly reddish; legs and maxillary palpi yellowish; antennae dark-brown, with the basal 2-3 antennomeres pale-reddish and antennomere XI reddish to dark-reddish.

Head ( Fig. 15 ) distinctly transverse, narrowly to broadly impunctate along middle; punctation in lateral dorsal portions moderately dense and rather fine. Eyes slightly longer than postocular region in dorsal view. Antenna ( Fig. 16 ) rather massive and 2.7- 2.9 mm long; antennomeres IV-VII as long as broad or weakly oblong, VIII-IX very weakly transverse, X much less than 1.5 times as broad as long, and XI approximately as long as the combined length of IX and X.

Pronotum ( Fig. 15 ) rather large in relation to head, distinctly transverse, 1.14-1.15 times as broad as long, and approximately 1.36 times as broad as head; punctation fine to moderately fine and moderately dense, more or less equally distributed; interstices on average broader than diameter of punctures; midline narrowly impunctate; lateral margins each with two moderately long setae, one at anterior angles and one at anterior third. Elytra ( Fig. 15 ) 0.76-0.77 times as long as pronotum; punctation moderately dense and not very coarse, equally distributed. Hind wings fully developed. Metatarsomere I longer than the combined length of II-IV.

Abdomen ( Fig. 17 ) approximately as broad as elytra, with rather shallow anterior impressions on tergites III-V; anterior impressions of tergites III-V with sparse and fine non-setiferous punctures; disc of tergite III with a lateral puncture on either side and with four punctures at posterior margin; tergite IV with a lateral marginal puncture on either side and with eight punctures at posterior margin; tergite V with a lateral puncture on either side, with a median pair of punctures, and with 10-12 punctures at posterior margin; tergite VI with a transverse band of non-setiferous punctures near anterior margin, with a lateral puncture on either side, with a transverse series of eight punctures in posterior portion, and with approximately twelve punctures at posterior margin; tergite VII ( Fig. 18 ) with a transverse band of dense non-setiferous punctures anteriorly and with three partly somewhat irregular transverse series of setiferous punctures in posterior half; tergite VIII ( Fig. 18 ) in posterior portion with punctation bearing long black setae; integument without microsculpture and glossy; posterior margin of tergite VII with palisade fringe; posterior margin of tergite VIII truncate or weakly concave in the middle.

3: sternite VIII somewhat longer than tergite VIII, its posterior margin convex; median lobe of aedeagus 0.95 mm long and shaped as in Figs 33-34 ; paramere of the usual condition, with moderately long apical lobe.

♀: posterior margin of sternite VIII weakly concave in the middle.

C o m p a r a t i v e n o t e s: The new species belongs to a very speciose group of species with a similar coloration pattern (ASSING in press b). In both external and the male sexual characters, it is most similar to Z. gilvipalpis ASSING , in press from East Yunnan. It differs from that species particularly by the less dense and equally distributed punctation of the elytra and by the different shape of the ventral process of the aedeagus (more slender in lateral and in ventral view, and with a less acute apex in ventral view.

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type specimens were collected in two localities at and near a pass to the northwest of Sa Pa, North Vietnam, at altitudes of 1850 and 2010 m. They were sifted from leaf litter and roots in secondary deciduous forests. The type locality is illustrated in Fig. 62 . An association with ants was not observed.

Figures

Figs 10-19: Peltodonia atripalpis nov.sp. (10-11), Tetrabothrus bicolor CAMERON (12-14), and Zyras fansipanicus nov.sp. (15-18): forebody (10, 12, 15); antenna (11, 13, 16); abdomen (14, 17); abdominal segments VII-VIII (18). Scale bars: 0.5 mm.

Figs 27-34: Orphnebius fansipanicus nov.sp. (27-29), O. dishamatus ASSING (30), Tetrabothrus bicolor CAMERON (31-32), and Zyras fansipanicus nov.sp. (33-34): aedeagus in lateral and in ventral view (27-28, 31-34); apical portion of paramere (29-30). Scale bars: 0.2 mm.

Fig. 62: Type locality of Zyras fansipanicus nov.sp. Photo: Paul Wunderle.