Oedichirus astoni

Rougemont, Guillaume de, 2018, New oriental Oedichirus (Staphylinidae, Paederinae, Pinophilini), Linzer biologische Beiträge 50 (1), pp. 461-536 : 468

Oedichirus astoni ROUGEMONT (Figs 2)

Oedichirus astoni ROUGEMONT, 2017a: 270.

M a t e r i a l s t u d i e d: ♂ Holotype: #3 of 2.iii.11, Wang Tong, Lantau, HK [P. Aston leg.] / HOLOTYPE Oedichirus astoni Des. 2016 G. de Rougemont [CRO].

D e s c r i p t i o n: Length: ca. 7.2 mm; length of fore-body: 3.1; length of head: 0.8; breadth of head: 1.05; length of antenna: 1.8; length of pronotum: 1.18; breadth of pronotum: 0.92; length of elytron: 1.28; breadth of elytra: 1.3. Head black, pronotum red, elytra bicolorous, the anterior two thirds black, posterior third red; abdominal segments III-V red, VI-IX black; mandibles rufous; maxillary palpi dark brown; legs rufotestaceous, from front to back the knees progressively broadly infuscate, on hind legs the proximal 4/7 th of femora rufous, distal 3/7 th black, proximal 4/7 th of tibiae black, distal 3/7 th rufous. All dorsal surfaces glossy, devoid of microsculpture; pubescence pale, very long and sparse, erect or semi-erect. Habitus: Fig. 11 Rougemont, in press; facies, colour pattern and puncturation as in Fig 5h.

Head transverse (1.2: 0.8); eyes large and protruberent; post-ocular border strong, formed of a salient carina under a series of small punctures; puncturation of disc consisting of a pair of longitudinal arcuate series of 4 setiferous punctures enclosing a single large median puncture in addition to 4-5 small punctures on inner margin of eye and other scattered smaller punctures. Labrum very short and broad, its anterior margin with four small teeth. Antennae long (2.1), segments II-IV subequal (0.22), V-XI progressively shorter, XI (0.12) obconical and truncate. Pronotum elongate (1.1: 0.92), the sides slightly concavely retracted posteriad; lateral border only present for a short distance near anterior angles; puncturation of disc consisting of a pair of arcuate longitudinal series of 4 large punctures behind a pair of small punctures, a lateral series of two large punctures, and a few scattered smaller punctures. Elytra measured at centre of each elytron short (60), as broad as long, very convex; fully winged. Abdominal tergites with three discrete rows of punctures behind basal row of short longitudinal ridges and furrows.

Male: abdominal sternite VII unmodified; sternite VIII: Fig. 11s8 Rougemont in 2017a; aedoeagus: Fig. 2arl, the process of the ventral sclerite of median lobe long, slender, curved, a little asymmetrical; parameres very slender, reaching tip of median lobe.

This species is a member of the O. Alatus group, very similar to O. guomindangi nov.sp. described below and also the other species of that group with black head and first three exposed abdominal segments red. The ventral process of the aedoeagus is simlar to that of O. falcifer nov.sp. but even longer; the red portion occupies less than half the area of elytra.

Map 2 . Key 1.

Figures

Map 2: Distribution of the O. Alatus group. Red circles: O. alatus; blue circles: O. chapmani; green circle: O. sihanouki; blue square: O. vexans and sp. A5; red square: O. falcifer; green lozenge: O. patcholatkoi; red lozenge: O. guomindangi; green square: O. astoni; blue stars: O. javanicus; red star: sp. A1; blue triangle: sp. A3; red triangles: sp. A4.