Metolinus squamifer, 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 : 1220-1221

Metolinus squamifer nov.sp.

( Figs 4-6 )

Examined material Holotype ♂: Thailand, Chumphong prov., Pha To env., 8.48N, 98.47E, K. Majer 1-21.III.1996 ( NHMB); paratype: same data, 1♂ ( cB).

Description: Length of body 3.7 mm; from anterior margin of head to posterior margin of elytra: 2 mm. Body shiny, reddish brown very dark; antennae and legs brown. Head sub-quadrangular, slightly dilated forward, with sub-parallel and sub-rectilinear sides and rounded posterior angles. Eyes large and a little protruding. Surface of head with few, very sparse punctures. Pronotum longer than head, a little dilated anteriorly where is wide as head, with very oblique anterior margins, largely rounded anterior angles and feebly sinuate sides. Surface with dorsal series of 2 anterior and 3 posterior punctures; lateral series of 2 very fine, anterior punctures. Elytra sub-rectangular, dilated posteriad, longer and wider than pronotum, with marked humeral angles. Surface with three series of very fine punctures, one juxtasutural, one median and one lateral. Abdomen without micro-sculpture, with fine and very sparse punctation.

Tergite and sternite of the male genital segment as in Figs 4-5 . Aedeagus ( Fig. 6 ) 0.81 mm long, ovoid elongate, with short, narrow parameres; inner sac with a long, narrow, left spine, next to a series of square, small scales; in the middle of the sac are present numerous square scales, roughly on two juxtaposed files, shaped like a tapered spine.

Etymology: The specific epithet is the Latin squamifer- a- um (squamous).

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

Remarks: This species, for the external characters and those of the inner sac of the aedeagus, is isolated from the congeners, so it is difficult to compare with other taxa.

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).