Oedichirus brlensis, Rougemont, 2018

Rougemont, Guillaume de, 2018, New oriental Oedichirus (Staphylinidae, Paederinae, Pinophilini), Linzer biologische Beiträge 50 (1), pp. 461-536 : 472

Oedichirus brlensis nov.sp.

(Figs 25)

Material studied: ♀ Holotype: SABAH, Danum Valley, BRL [ Borneo Rainforest Lodge ], f.i.t., 14-16.II.2007, G. de Rougemont / HOLOTYPE Oedichirus brlensis des. 2015 G. de Rougemont [ CRO] ; 1 paratype: [Ibid.] [ CRO] .

Description: length: 10.3 mm; length of fore-body: 4.2; length of head: 1.05; breadth of head: 1; length of antenna: 3.1; length of pronotum: 1.3; breadth of pronotum: 0.95; length of elytron: 1.62; breadth of elytra: 1.45. Body entirely black; legs pale testaceous, the knees sharply infuscate; palpi and antennae testaceous. Dorsal surfaces devoid of microsculpture except on anterior margins of abdominal tergites. Pubescence fine, pale, moderately long, erect. Antennae and legs very long. Habitus: Fig. 25h.

Head slightly longer than broad; temples long, retracted in almost straight lines to neck, posterior angles obsolete; post-ocular border present in the form of a fine carina that extends forwards to under the hind margin of eye, not forming a tooth or angle; centre of vertex with a cluster of five large contiguous punctures, the anterior three each bearing two setae, so apparently formed by the coalescence of two punctures; rest of disc with coarse irregular punctures, those of anterior half finer, of posterior half coarser. Pronotum very elongate, widest at anterior 1/5 th, the sides concavely retracted in dorsal view, with an entire lateral border consisting of a series of small punctures above a fine irregular carina; disc, depending on interpretation, without discal series, or with an irregular double column of large and smaller punctures on either side of a longitudinal raised callosity, in front of this with three transverse rows of punctures, the sides with a lateral series of five large puncures and randomly scattered smaller punctures. Fully winged, elytra ample, convex, with pronounced humeral angles; puncturation coarse and dense, the interstices everywhere smaller than diameter of punctures. Punctures of abdomen coarse, disposed randomly.

Female: sternite IX: Fig. 25vp.

Together with O muluensis nov.sp., O. wallacei nov.sp. and O. tempestivus nov.sp. this new species forms a group endemic in Borneo (‘Wallacei group’) characterised by long temples with obsolete angles, very long antennae and legs, and concave sides of pronotum. In all these species the row of small keels behind the anterior margins of abdominal tergites are obsolescent except on tergite III, and even there is short.

Key 2

The abdominal tergites V, VI and VIII of the holotype bear some Laboubeniales.