Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 101. (Budapest 2009)

Makranczy, Gy.: The genus Thinodromus Kraatz, 1857 in West-Central Africa (Coleoptera, Staphylinidae: Oxytelinae)

The genus Thinodromus in West-Central Africa ( Coleoptera) 49 Thinodromus mateui sp. n. (Figs 4-5, 35-36, 38, 41-43, 69) Type material - Holotype (male):"Gabon, [Ogooue-Ivindo,] IV.

1971, Makokou [00°34' N, 12°52' E], [leg.] J. Mateu" (MHNG). Paratypes (2): same data as holotype (1 female MHNG, 1 male [aedeagus missing] MRAC). Description - Measurements (in mm, n = 3): HW = 0.45 (0.44-0.47); TW = 0.41 (0.40-0.41); PW = 0.52 (0.51 -0.53); SW = 0.62 (0.61 -0.63); AW = 0.70 (0.68-0.72); HL = 0.29 (0.28-0.30); EL = 0.18 (0.17-0.18); TL = 0.02 (0.02-0.03); PL = 0.37 (0.35-0.39); SL = 0.62 (0.60-0.64); SC = 0.57 (0.55-0.59); BL = 2.31 (2.17-2.43); FL = 1.29 (1.25-1.33) mm. - Colour. Body moderately shining, very dark reddish-brown, almost black, first antennomeres lighter, yellowish. Legs uniformly dark brown. - Shape and sculpture. Head rather transverse, eyes occupy sides of head, temples hardly discernible. Antennái segments more cylindrical, antennomeres 4-5 1.21-1.45x longer than broad, antennomeres 9-10 1.13-1.27X broader than long (in females almost the same) (Figs 4-5). Pronotum very transverse, sides noticeably concave in the second half, before posterior angles. With rather deep and broad horseshoe-shaped impression, in the form of a shallow depression even extending to the anterior edge of pronotum. Reflexed lateral margin rather thin, only apparent in the posterior third, anteriorly absent, posteriorly medium wide. Elytra together slightly (1.28x) broader than long, dilating towards apex, gently impressed in anterior half of disc. - Punctation and microsculpture. Head punctation rather fine and very dense, interspaces less than diameter of punctures. Pronotal punctation consists of variously sized punctures (a few twice as large as others), interspaces much less than average puncture diameters. Elytral punctation moderately deep, somewhat irregular, interspaces smaller than diameters. Abdomen rather coarsely punctured, deep, rather closely spaced punctures, becoming slightly sparser towards apex. No apparent microsculpture anywhere on the body except posterior pronotal corners, where punctation diminishes into coriaceous ground sculpture. - Pubescence. Setation exceptionally dense (especially on head), medium long uni-sized hairs. On abdominal terga among the usual sized setae with some longer hairs. - Primary and secondary sexual features. Male: in the inner sac of aedeagus the AC weakly developed, but MA unusually large (Figs 41-43), sternite VIII (Fig. 35), tergite X (Fig. 36); female: ringstructure (Fig. 69). Comparative notes - By far the smallest species known in the region. Also unique in having more cylindrical (rather than ovoid) antennomeres. This taxon appears to stand alone without any known relatives in West-Central Africa. Not only the external morphology and the male genitalia, but also the female ringstructure suggest distant connections to the other species here. It possibly has closer relatives elsewhere in Africa or in Asia. Etymology - The species is named after the collector of the type specimens. Annls hist.-nat. Mus. natn. hung. 101, 2009