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) 39 Thinodromus excultus sp. n. (Figs 10, 13-15,27-28, 66) Type material - Holotype (male, antennae lost): "Yengiie [2° 13' N, 9°53' E], R[io] Campo, Guinea Espanola [Equatorial Guinea], J. Mateu leg., [on the backside] 23-27. (IX. 1948)" (MRAC). Paratype ( 1 female): same data as holotype, (MRAC). Description - Measurements (in mm, n = 2): HW = 0.57 (0.56-0.57); TW = 0.48 (0.48-0.48); PW = 0.61 (0.60-0.61 ); SW = 0.75 (0.74-0.76); AW = 0.82 (0.80-0.84); HL = 0.31 (0.30-0.32); EL = 0.22 (0.21-0.22); TL = 0.02 (0.02-0.02); PL = 0.46 (0.46-0.46); SL = 0.75 (0.74-0.76); SC = 0.69 (0.68-0.70); BL = 3.15 (3.10-3.20); FL = 1.51 (1.50-1.52) mm. - Colour. Body appears quite shiny, principally for the very fine punctation and large unsculptured interspaces. Dark blackish brown, legs and antennae dark brown, supraantennal tubercles somewhat lighter, brown. Tips of tibiae and tarsi also lighter. - Shape and sculpture. Head rather transverse, temples hardly noticeable to absent, eyes occupy sides ofhead. Antennái segments ovoid, antennomeres 4-5 1.10-1.20x longer than broad, antennomeres 9-10 1.07-1.14x broader than long (female antenna). Pronotum also transverse, posterior half of pronotal side straight or very gently concave. Pronotal impression moderately deep horseshoe-shaped, its side branches anteriorly reach till the horizontal middle-line of pronotum, no other apparent impression. Reflexed lateral margin very thin, not very conspicuous, only apparent in the posterior half of pronotal side and very fine on the posterior edge. Elytra together 1.20x broader than long, dilating towards apex, has a rather conspicuous impression posterior to the scutellum and shallow oblique depressions in the anterior half of disc. - Punctation and microsculpture. Head punctation extremely fine and uniform with varying interspaces (sometimes twice as diameters). Pronotal punctation very fine and uniformly sized, interspaces varying slightly, usually larger than puncture diameters. Elytral punctation coarser, puncture size and shape vary, average interspace 1/2 of diameters. Abdominal punctation fine and uneven, with greatly varying (but usually larger than diameter) interspaces, posteriorly finer on terga. No apparent microsculpture anywhere on the body except posterior pronotal corners, where punctation diminishes into coriaceous ground sculpture. - Pubescence. Setation uni-sized, medium dense, semierect, hairs are rather long. On abdominal terga among the usual sized setae with some longer hairs. - Primary and secondary sexual features. Male: in the inner sac of the aedeagus (Figs 13-15) AC very large and thick, other sclerites much less prominent, sternite VIII (Fig. 27), tergite X (Fig. 28); female: ringstructure (Fig. 66). Comparative notes - This species can be distinguished by the unusually fine punctation from most congeners in the region. Among the species dealt with here, this taxon has no obvious relatives; perhaps a more distant connection can be stated with T. makokouensis, T. mauritaniens and T. odzalensis, based on certain genital features. The female ringstructure also has rather unique formation, unfortunately the females of the latter three species are still unknown. Etymology - The name refers to the rather fine and very uniform punctation on the pronotum of the species. X Annls hist.-nat. Mus. natn. hung. 101, 2009