Oedichirus dzumacensis, Rougemont, 2018

Rougemont, Guillaume de, 2018, The genus Oedichirus in New Caledonia (Staphylinidae: Paederinae: Pinophilini), Linzer biologische Beiträge 50 (1), pp. 537-586 : 546-547

Oedichirus dzumacensis nov.sp. (Figs 30)

Material studied: ♂ Holotype: NEW CALEDONIA 9913, 22º03’S x 166º28’E, Mt Dzumac road, 700m, 1 Dec 2000, GB Monteith, Pyrethrum, trunks & logs ♀ HOLOTYPE: Oedichirus dzumacensis des. 2017 G. de Rougemont [ MNHN] ; 1♀ paratype: [Ibid.] ♀ PARATYPE Oedichirus dzumacensis des. 2017 G. de Rougemont [ QM] .

Description: length: 7.5-8 mm; length of fore-body: 3.3; length of head: 0.9; breadth of head: 1.1; length of antenna: 2.3; length of pronotum: 1.35; breadth of pronotum: 0.1.4; length of elytron: 1; breadth of elytra: 1.2. Head and pronotum piceous, elytra reddish-brown, the suture narrowly infuscate, abdomen brown, anterior margins of tergites III-V infuscate, the infuscation progressively extensive on tergites VI-VIII; palpi, antennae and legs entirely testaceous. Dorsal surfaces devoid of microsculpture except for transverse micro-striation on abdominal tergites, particularly apparent on segments VII and VIII. Pubescence sparse, moderately long, pale, erect on head, darker and much shorter, erect on pronotum, longer, pale and semi-erect on elytra, pale, longer and denser, semi-erect and decumbent on abdomen. Habitus: Fig. 30h.

Head moderately transverse; eyes large and prominent; temples rounded between eye and neck; carina of post-ocular border entire, extending from eye to neck on lateral margin, but the associated broad groove is displaced to dorsal surface parallel to lateral margin, merging anteriad with a narrow groove that runs parallel to the inner margin of eye; puncturation fairly dense but irregular on vertex, the punctures round, umbilicate, but shallow, frons almost impunctate. Pronotum moderately long, behind anterior angles broader than head, the sides strongly convergent in straight lines to narrow base; lateral margins entirely bordered; puncturation coarse, homogeneous, dense, the interstices much narrower than diameter of punctures. Elytra short, distinctly transverse, humeral angles completely obsolete, the joint apical margins gently arcuately concave; puncturation homogeneous, punctures round, about as large as those of pronotum, but a little sparser. Transverse rows of keels and grooves of anterior margins of abdominal tergites obsolescent on tergites III and IV, moderately long and pronounced on V-VII; puncturation of tergites homogeneous and dense on segments III-VI, punctures finer and shallower on tergite VII, obsolescent on VIII.

Male: abdominal sternite VIII (Fig. 30s8) with a broad, slightly asymmetrical apical emargination, the surface on either side of this with a pair of carinae prolonged posteriad into a rounded lamellate fold curving inwardly over the surface of sternite; aedoeagus Figs. 30arl, av.

Female: abdominal sternite IX: Fig. 30vp.