Margarinotus (Asterister) unus, Mazur, 2007

Mazur, S., 2007, New Oriental Histeridae (Coleoptera), Baltic Journal of Coleopterology 7 (2), pp. 137-147 : 142

Margarinotus (Asterister) unus sp. nov.

Body ( Fig. 16) oval, convex, shiny. Upper side finely punctulate, the punctation variable, from very sparse and indistinct to rather coarse and dense, especially on pronotum. Head, anterior and lateral parts of pronotum, sides and apex of elytra and lateral parts of pro- and pygidium brownish-red. Forehead flat, moderately punctulate. Frontal stria complete, feebly and outwardly bent at middle, subcariniform. Labrum narrow, as long as broad. Mandibles feebly convex, extremely finely punctulate. Scapus and funiculus brownish-red, antennal club tomentose, with two distinct sutures.

Pronotum rounded laterally, sinuous at anterior margin. Anterior and lateral parts more or less brownish-red, the remaining part blackish-brown. There is usually a small, round and blackish spot on each pronotal side. Marginal pronotal stria complete laterally, interrupted behind head. Lateral stria distinct, incised and feebly crenate, parallel to margin, reaching basally the posterior angles and united usually with an apical stria behind head, sometimes narrowly interrupted behind eyes. Pronotal base with an indistinct longitudinal impression in front of scutellum.

Epipleural fossete flat or feebly concave, covered with some coarse punctures along outer margin. Marginal elytral stria absent. Marginal epipleural stria complete, impressed. External Subhumeral stria complete and crenate. Internal subhumeral stria absent. Oblique humeral stria present on basal 1/4. Dorsal striae incised and crenate, 1 - 4 complete, the fifth one reaching almost the midlength, the sutural stria complete, arched inwardly at base.

Pygidial segments feebly alutaceous. Propygidium with an elevation on lateral area and a feeble depression behind each posterior angle, its surface covered with double punctation, consisting of large punctures with flat bottom intermingled with the small ones, rather irregularly distributed (0.5 - 3.0). Punctation of pygidium similar to propygidial one, but sparser and fine, becoming finer apically.

Prosternal lobe ( Fig. 17) rounded, distinctly margined anteriorly, shallowly and finely punctulate, more coarsely at sides. Prosternal keel very finely and rarely punctulate. Carinal striae thin but distinct, divergent anteriorly. Mesosternum straight at anterior margin, finely and rarely punctulate. Marginal stria complete, subcariniform, reaching the meso-metasternal suture. Meso-metasternal suture subcariniform, sinuate. Metasternum as punctulated as mesosternum, with coarse punctures along the lateral metasternal stria. Median line distinct. Metasternal apex with a fine transverse line. Lateral metasternal stria subcariniform, extending obliquely and posteriorly, united with oblique stria which extends inwards from the middle of metasternal-metepisternal suture. Lateral disc of metasternum densely covered with large and shallow punctures.

Intercoxal disc of 1st abdominal sternum distinctly margined laterally.

Legs reddish-brown, a little expanded, the Protibiae with 7 small dents, the meso- and metatibiae with numerous spinules at outer margin.

The genital structure of the male as figured ( Figs. 18 - 21).

Length.PE: 2.8 - 3.3 mm; total: 4.0 - 5.2 mm.Width: 2.6 - 3.1 mm.

Holotype: a male, Laos, Bolikhamsai pr., Ban Nape, 7.-16.2006, 18 o 20˙ N, 105 o E, E. Jendek & O. Sausa leg, [ CHTL].

Paratypes: 31 specimens of both sexes, same locality, collectors and data as the holotype [ CHTL]. Six of them in the author˙s collection [ CHSM], Thailand, Doi Chiang Dao, Wildlife Sanct., Chiang Dao Dist., 500 m, 25.10-23,11.1990, BF, P. Schwendinger leg. [ CHSM] .

Differential diagnosis. By the body coloration this species resembles M. (A.) bicolor Mazur, 1993 ( Malaysia: Sabah), but the genital structure shares it with M. (A.) curvicollis (Bickhardt, 1913) (Taiwan).