Mahavana vulcanicola, Bordoni, 2017

Bordoni, Arnaldo, 2017, New data on the Xantholinini from China. 28. New species from Yunnan, Sichuan and Hubei (Coleoptera, Staphylinidae), Beiträge Zur Entomologie = Contributions to Entomology 67 (2), pp. 271-274 : 272

Mahavana vulcanicola spec. nov.

urn:lsid:zoobank.org:act:B2D2CDD6-2F9A-4B4C-B4BA-D5C2CDCC838B

( Figs 1-5 )

Examined material: Holotype ♂: China, Yunnan, Heshun env. , Tengchong , 1600 m, A. Tilli VIII.2012 ( cB).

Description: Length of body 4.2 mm; from anterior margin of head to posterior margin of elytra: about 2.2 mm. Body shiny, reddish brown with darker head; antennae and legs yellowish. Head dilated forward and narrow posteriad, with protruding eyes, pronotum narrow, elytra large and very long. Head ( Fig. 1 ) with feebly rounded sides from eyes to neck. Eyes large and protruding. Surface of head with evident sparse punctation, with long setae. Last antennomeres as in Fig. 2 . Pronotum longer and very narrower than head, with very oblique anterior margins, rounded anterior angles and sinuate sides. Surface with dorsal series of 11 well visible punctures and lateral series of 8 finer punctures; all the punctures with long setae. Elytra sub-rectangular, very large and long (0.85 mm / head and pronotum: 1.3 mm), very longer and wider than pronotum, with sub-rectilinear and sub-parallel sides and rounded humeral angles. Surface with some series of superficial punctures. Abdomen without micro-sculpture, with fine and sparse punctation.

Tergite and sternite of the male genital segment as in Figs 3-4 . Aedeagus ( Fig. 5 ) 0.74 mm long, sub-spherical, with long, symmetric parameres, provided with some proximal, short setae; inner sac with 5 large spines and sparser scales. The spines with the proximal portion in form of transparent drop.

Etymology: The specific epithet refers to the volcanic nature of the places.

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

Remarks: This specimen was originally attributed to M. goaligong BORDONI, 2010 from Yunnan (Goaligong Mts) but to a subsequent examination it was found to be distinct species of larger body, head more dilated forward, more protruding eyes, longer second antennomere, longer and narrower pronotum, longer elytra and different inner sac of the aedeagus. Actually the known species of the genus Mahavana BORDONI, 2002 are 19.

Figures

Figs 1-6: Head, last three antennomeres, tergite and sternite of the male genital segment, aedeagus of Mahavana vulcanicola spec. nov. (1-5): Evaginated inner sac of Phacophallus japonicus (CAMERON) (6) (scale bar: 0.1 mm).