Oedichirus sihanouki, Rougemont, 2018

Rougemont, Guillaume de, 2018, New oriental Oedichirus (Staphylinidae, Paederinae, Pinophilini), Linzer biologische Beiträge 50 (1), pp. 461-536 : 501-502

Oedichirus sihanouki nov.sp.

(Figs 8)

Material studied: ♂ Holotype: CAM.: Waza, 19-III.-1972, J. A. Grewell / At black light / CAMBODIA / HOLOTYPE Oedichirus sihanouki Des. 2017 G. de Rougemont [ FMC].

Description: length: ca. 7.6 mm; length of fore-body: 2.1; length of head: 0.62; breadth of head: 0.89; length of antenna: 1.7; length of elytron: 1.15; breadth of elytra: 1.25. Head black, pronotum red, anterior 3/4 ths of elytra black, posterior 1/4 th red, abdominal segment III-VI red, VII-IX black; mouthparts, antennae and legs entirely testaceous. Body devoid of microsculpture except around basal keels of abdominal tergites. Pubescence of elytra and abdomen fairly sparse, fine, pale, moderately long, erect. Habitus: Fig. 8h.

Head slightly narrower then pronotum; eyes very large; post-ocular border well marked by a punctate groove and carina which does not form a tooth behind the eye; disc of head sparsely punctate, with a circle of ca. ten punctures in anterior half of head, the anterior punctures very fine, the posterior ones larger, a series of about six small punctures extending from antennal tubercle along inner margin of eye, and three setiferous punctures arising from the post-ocular grooves. Pronotum short and broad; lateral margins not bordered; disc with a pair of discal series of six punctures each, two pairs of punctures above this, five punctures on anterior and anterior lateral margin, and a single puncture on posterior lateral margin. Fully winged, elytra short and broad, with a juxta-sutural series of about eight punctures and numerous punctures in anterior 2/3 rds, more sparsely punctate laterally. Abdominal puncturation arranged in three discrete transverse rows.

Male: sternite VII unmodified; sternite VIII (Fig. 8s8) with an asymmetrical posterior margin, a membranous flange and a comb of setae; aedoeagus: Fig. 8arl, the right paramere free, long and sinuate.

O. sihanouki nov.sp. is the only oriental species with the same colour pattern as O. chapmani Cam. (bicolorous elytra, with four red abdominal segments), but is a smaller insect, with pronotal discal series of six instead of four punctures, less extensive red portion of elytra and denser puncturation of the elytra.

Distribution: Map 2 . Key 1

Waza is not a locality, but the acronym of the World Association of Zoos and Aqariums, which has conducted research in the Cardamom Hills of western Cambodia.

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.