Medon manasluensis, Assing, 2010

Assing, V., 2010, A revision of Palaearctic Medon. VIII. A new species from Nepal and additional records (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 42 (1), pp. 489-498 : 495-497

publication ID

https://doi.org/10.5281/zenodo.5332281

publication LSID

lsid:zoobank.org:pub:9C384583-4849-49AA-B7C0-903FFE41BAC9

persistent identifier

https://treatment.plazi.org/id/0A172832-FFA8-E333-FF1E-522AA482FE1E

treatment provided by

Carolina

scientific name

Medon manasluensis
status

nov.sp.

Medon manasluensis   nov.sp. ( Figs 8-14 View Figs 8-14 , Map 1 View Map 1 )

T y p e m a t e r i a l: Holotype: " Nepal, Manaslu Mts., SE slope, W Gupchi Danda, 2500- 2800 m, 19./ 20.V.2006, leg. J. Schmidt, 28°08'59"N, 84°46'06"E / Holotypus Medon manasluensis   sp.n. det. V. Assing 2009 " (NME). Paratypes: 1, 1: same data as holotype (NME, cAss).

D e s c r i p t i o n: Body length 4.0-4.5 mm. Habitus as in Fig. 8 View Figs 8-14 . Coloration: body blackish, with indistinctly paler elytra and brownish abdominal apex; legs and antennae brown.

Head weakly transverse, across eyes approximately 1.05 times as wide as long; punctation very dense and rather coarse; interstices very narrow, much narrower than diameter of punctures, without microsculpture; eyes distinctly bulging and rather large, approximately as long as postocular region in dorsal view ( Fig. 9 View Figs 8-14 ). Antenna with antennomere III approximately as long as II; X very weakly transverse.

Pronotum approximately as wide as long and as wide as head, weakly tapering posteriad ( Fig. 9 View Figs 8-14 ); punctation very dense and rather coarse; midline narrowly impunctate at least in posterior 1/2-2/3; interstices much narrower than diameter of punctures and without microsculpture.

Elytra short, 0.70-0.75 times as long, and at posterior margin slightly wider than pronotum, weakly widened posteriad; humeral angles weakly pronounced; punctation fine, dense, and shallow ( Fig. 9 View Figs 8-14 ). Hind wings reduced.

Abdomen approximately as wide as elytra; punctation very fine and dense; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe.

: posterior margin of sternite VII produced in the middle, in the middle of this projection shallowly V-shaped, margin of this V-shaped excision with few blackish setae on either side ( Figs 10-11 View Figs 8-14 ); posterior margin of sternite VIII with moderately deep excision, its depth approximately 1/4 the length of sternite ( Fig. 12 View Figs 8-14 ); aedeagus as in Figs 13-14 View Figs 8-14 , apex in ventral view weakly concave.

C o m p a r a t i v e n o t e s: With one exception ( M. deharvengi   ), the new species is separated from all other congeners known from Nepal by the short elytra, the reduced hind wings, and the absence of a palisade fringe at the posterior margin of the abdominal tergite VII alone. Based on the extremely similar external appearance, as well as on the derived male sexual characters (shape and chaetotaxy of the male sternite VII, shape of aedeagus), M. manasluensis   is closely related to, and quite possibly the adelphotaxon of M. deharvengi   , a hypothesis also supported by the fact that the Manaslu range is adjacent to the Annapurna range. The eyes are slightly smaller (somewhat shorter than postocular region) in M. deharvengi   than in M. manasluensis   , but otherwise both species are reliably distinguished only based on the male sexual characters. In M. deharvengi   , the male ster- nite VII is more strongly produced in the middle, this projection is more deeply and more narrowly incised in the middle, and the blackish setae are stouter, longer, and situated nearer to the apex. Also, the aedeagus is apically distinctly bifid in ventral view. For illustrations of the male sexual characters of M. deharvengi   see Figs 3-7. View Figs 1-7

E t y m o l o g y: The specific epithet (Latin, adjective) is derived from the name of the mountain range where the type locality is situated.

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 on the southeastern slope of the Manaslu range, in the north of central Nepal ( Map 1 View Map 1 ). The type specimens were collected at an altitude of 2500-2800 m.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Medon