Oedichirus semibrunneus, Rougemont, 2018

Rougemont, Guillaume de, 2018, The genus Oedichirus in New Caledonia (Staphylinidae: Paederinae: Pinophilini), Linzer biologische Beiträge 50 (1), pp. 537-586 : 566-567

Oedichirus semibrunneus nov.sp. (Figs 19)

Material studied: ♂ Holotype: New Caledonia, Col des Roussettes , 12.xi.1998, I. Löbl, litter in ravine ♀ HOLOTYPE Oedichirus semibrunneus Des. 2016 G. de Rougemont [ MHNG] ; 1♀ paratype: [Ibid.] ♀ PARATYPE Oedichirus semibrunneus Des. 2016 G. de Rougemont [ CRO] .

Description: length: ca. 7.7 mm; length of fore-body: 3.3; length of head: 0.95; breadth of head: 1.12; length of pronotum: 1.3; breadth of pronotum: 1.15; length of elytron: 1; breadth of elytra: 1.25. Head and pronotum black, elytra reddish-brown, the suture narrowly infuscate; abdomen bicolorous, the centres of tergites increasingly broadly black, the sides brown; palpi, antennae and legs entirely testaceous. Head densely microreticulate, pronotum and elytra devoid of microsculpture, abdomen with dense transverse micro-striation. Dorsal surfaces glabrous apart from a few short hairs on frons. Habitus: Fig. 19h.

Head moderately transverse; eyes large and protruberant, about as long as temples, the latter regularly rounded to neck; post-ocular border narrow, shallow, a little displaced to dorsal surface from lateral margin; puncturation coarse and dense, consisting of more than 40 umbilicate punctures, leaving frons and postero-lateral areas impunctate. Pronotum moderately elongate, the sides convergent in slight curves to narrow base; lateral margins entirely bordered; puncturation dense, interstices nearly everywhere narrower than diameter of punctures, punctures at centre slightly elongate. Elytra short, humeral angles completely obsolete, the sides forming a distinct angle at mid-length; puncturation dense, the punctures larger than those of pronotum near suture, smaller laterad. Keels and grooves of anterior margins of abdominal tergites well-marked; puncturation dense and homogeneous.

Male: aedoeagus: Figs. 19arl, av.

Female: sternite IX (damaged): Fig. 19vp.

O. semibrunneus nov.sp. is very similar to O. bilaminatus nov.sp., from which it is distinguished by the aedoeagus and conformation of the female ninth sternite.