Oedichirus burwelli, Rougemont, 2018

Rougemont, Guillaume de, 2018, The genus Oedichirus in New Caledonia (Staphylinidae: Paederinae: Pinophilini), Linzer biologische Beiträge 50 (1), pp. 537-586 : 543-544

Oedichirus burwelli nov.sp. (Figs 18)

Material studied: ♂ Holotype: NEW CALEDONIA 1119, 21º53’S x 166º26’E, Mt Humboldt summit, 5 November 2001, 1600 m, Burwell, Monteith & Wright ♀ HOLOTYPE Oedichirus burwelli des. 2017 G. de Rougemont [ MNHN] ; 1♀ paratype: NEW CALEDONIA 11123, 21º53’Sx166º25’E’ 135m, Mt. Humboldt, refuge creek, 7 Nov 2002, CJ Burwell, pyrethrum trees & logs ♀ PARATYPE Oedichirus burwelli des. 2017 G. de Rougemont [ QM] ; 1♀: paratype: NEW CALEDONIA 11138, 21º53’Sx166º24’E’, 1400m, moss forest, 6-7 Nov 2002, Monteith & Burwell, pyreth. trees & logs ♀ PARATYPE: Oedichirus burwelli des. 2017 G. de Rougemont [ CRO] ; 1♀ paratype: NEW CALEDONIA 11125, 21º53’S x 166º25’E’, Mt Humboldt source, Monteith & Burwell, pyreth. trees & logs ♀ PARATYPE Oedichirus burwelli des. 2017 G. de Rougemont [ QM].

Description: length: ca. 8.3 mm; length of fore-body: 3.2; length of head: 1; breadth of head: 1.17; length of antenna: 2.7; length of pronotum: 1.2; breadth of pronotum: 1.37; length of elytron: 1.18; breadth of elytra: 1.2. Head and pronotum piceous, elytra and abdomen brown, segments VI-IX progressively darker; palpi, antennae and legs entirely testaceous. Microsculpture very densely, finely coriaceous on head, making the surface sericeous, pronotum and elytra devoid of microsculpture, that of abdominal tergites weak, consisting of transverse micro-striae. Pubescence non-existent apart from a few small erect hairs on lateral and ventral surface of segments VI-VII. Habitus: Fig. 18h.

Head strongly transverse; eyes very protruberant; temples slightly rounded, longer than eyes; post-ocular groove a little removed from lateral margin to dorsal surface, merging anteriad with a narrow groove parallel to inner margin of eye; punctures of disc very small but umbilicate, and very sparse. Pronotum broad, relatively short, the sides fairly evenly rounded from base to posterior angles, the joint posterior margin arcuate; lateral margins entirely bordered; puncturation coarse and dense, the punctures simple, interstices mostly smaller than diameter of punctures. Keels and grooves of bases of abdominal tergites obsolete on segments III-IV, well marked but shallow on following segments; puncturation of tergites coarse and irregular, leaving progressively larger impunctate gaps on tergites V-VII.

Male: abdominal sternite VII (Fig. 18s7) with a small apico-median emargination bordered on either side by a salient rounded lobe; sternite VIII (Fig. 18s8) with a larger apico-median emargination, the surface surrounding this depressed, and flanked on either side by a salient blunt dentiform process; aedoagus: Figs. 18arl, av, with a large lamellate process of the ventral blade.

Female: sternite IX: Fig. 18vp.