Mahavana eximia, Bordoni, 2017

Bordoni, Arnaldo, 2017, New data on the Oriental Xantholinini. 43. New species and new records from Thailand in the Naturhistorisches Museum of Basel (Coleoptera Staphylinidae) 281 ° contribution to the knowledge of the Staphylinidae, Linzer biologische Beiträge 49 (2), pp. 1219-1229 : 1221-1222

Mahavana eximia nov.sp.

( Figs 7-9 , photo 1)

Examined material: Holotype ♂: Thailand, Nan prov., Doi Phuka Nat. Park , P. Prudek & M. Oboril 28.IV-12.V.2002 ( cB).

Description: Length of body 4.3 mm; from anterior margin of head to posterior margin of elytra: 2.4 mm. Body (photo 1) shiny, amaranth, with lighter elytra; antennae and legs amaranth. Head large, sub-rectangular, a little convex, with sub-parallel and sub-rectilinear sides and largely rounded posterior angles. Eyes medium-sized and protruding. Surface of head with spaced, more or less fine punctures. Pronotum slender, narrow, very narrower and shorted than head, with oblique anterior margins, rounded anterior angles and sinuate sides. Surface with dorsal series of 8-9 punctures and lateral series of 3 very spaced and fine punctures. Elytra large, very longer and wider than pronotum, slightly dilated posteriad, with marked humeral angles. Surface with some series of very fine and sparse puntures. Abdomen with traces of micro-sculpture and fine, very spaced punctation.

Tergite and sternite of the male genital segment very membranous and therefore difficult to draw with precise contours ( Figs 7-8 ). Aedeagus ( Fig. 9 ) 0.7 mm long, sub-spherical, with asymmetric, long and narrow parameres; inner sac tape-like, rolled on it once, covered with fine spinulae.

Etymology: The specific epithet is the Latin eximius- a- um (remarkable).

Distribution: The species is known only from the type locality.

Remarks: As indicated in another contribution ( BORDONI 2013a) the geus Mahavana BORDONI, 2002 is composed by two group of species, one that occurs in the Indochinese Peninsula [ M. antennalis (CAMERON, 1932) from North Myanmar, M. anotera BORDONI, 2002 from North Thailand, M. esophthalma BORDONI, 2002 from North Vietnam and M. miranda BORDONI, 2002 from Malaysia, M. anomala BORDONI, 2010a from Laos] and Yunnan ( M. gaoligong BORDONI 2010 , M. rhododendri BORDONI, 2013a and M. evestigata BORDONI, 2013a ). This group includes species usually reddish brown, with big eyes and often with very long and great last antennomeres. The second group includes yellowish pale, sub-anophthalmous species ( M. watanabei BORDONI, 2009 , M. daliana BORDONI, 2010 , M. schuelkei BORDONI, 2013a , M. acinosa BORDONI, 2013a , M. caeca BORDONI, 2013a ), all from Yunnan.

M. eximia belongs to the first group and differs from the known species by shape of the body and aedeagus. Actually the genus includes 14 species.

Figures

Figs 1-9: Male genital segment, sternite of the same and aedeadus (1-3) of Neoxantholinus thailandicus nov.sp. Tergite and sternite of the male genital segment and aedeagus (4-6) of Metolinus squamifer nov.sp. Tergite and sternite of the male genital segment and aedeagus (7-9) of Mahavana eximia nov.sp. (m= membranous part) (scale bar: 0.1 mm).