Oedichirus birmanus FAUVEL

Rougemont, Guillaume de, 2018, New oriental Oedichirus (Staphylinidae, Paederinae, Pinophilini), Linzer biologische Beiträge 50 (1), pp. 461-536 : 470-471

Oedichirus birmanus FAUVEL

(Figs 43)

Oedichirus birmanus FAUVEL, 1895: 217

Oedichirus birmanus CAMERON, 1932: 28

Material studied: ♂ Type: Carin Asciui Ghecu 1400-1500 m L. Fea III-IV 88 / birmanus Fvl. / Ex-Typis [ IRScNB].

Aditional material: 1♂: THAILAND, C.M., Doi Pui , III.1987, G. de Rougemont / Oedichirus birmanus Fvl. det.. 2016 G. de Rougemont [ CRO] ; 1♀: THAILAND, Doi Pui, 14.III.1982, G. de Rougemont / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ CRO] ; 1♀: THAILAND, C. Rai, Mae Yao , 15.III.1982, G. de Rougemont / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ CRO] ; 1♀: C. Rai, Mae Yao , III.1987, G. de Rougemont / Oedichirus birmanus Fvl. 2016 G. de Rougemont [ CRO] ; 1♂: MON ANGGET , CHIANG MAI, THAILAND, 28.iv.1992, T. ITO leg. / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ CRO] ; 1♀: DOI SUTHEP , CHIANG MAI, THAI, 30.iv.1990, T. ITO / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ CIK] ; 1♀: THAILAND: Chieng Mai, Doi Inthanon , 1250 m, 6.XI.1985, Burckhardt-Löbl / Oedichirus sp. det. G. de Rougemont 1999 / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ MHNG] ; 2♀♀: THAILAND, Chieng Mai, Doi Suthep , 1400 m, 5.XI.1985, Burckhardt-Löbl / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ MNHG] ; 1♂: Thailand, Huay Nam Dang, Mae Taeng Dist ., 1400 m., 17.12.1990, P. Schwendinger / Oedichirus birmanus det. 2017 G. de Rougemont [ MHNG] ; 1♂: DOI INTHANON , CHIANG MAI, THAILAND, 26.IV.1992, T. ITO leg. / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ CIK] ; 1♀: WIANG PAPAO , CHIANG RAI, THAILAND, 1.V.1992, T. ITO leg. / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ CIK] ; 1♀: ( Nr. Meo village), about 1400-1500 m, North Thailand, 21-23 May 1979, W. Suzuki leg. / Oedichirus birmanus Fvl. det. 2016 G. de Rougemont [ CST].

Description (of type): length: 8.5 mm; length of fore-body: 3.2; length of head: 0.75; breadth of head: 1.17; length of antenna: 2; length of pronotum: 1.32; breadth of pronotum: 1.17; length of elytron: 1; breadth of elytra: 1.22. Body brown, abdominal segment VIII piceous (type) or entirely or in parts piceous; all appendages uniformly testaceous. Dorsal surfaces of fore-body devoid of microsculpture; abdomen entirely but feebly microsculptate (observed in good light at x40-50 magnification), the microreticulation much more evident on tergite VIII. Pubescence pale, moderately long, erect and semi-erect. Habitus (of type): Fig. 43h.

Head moderately transverse; eyes not very large; carina of post-ocular border very marked, forming a prominent dentiform angle more than usually distant from posterior margin of eye; puncturation dense, irregular, the punctures a little finer on frons, leaving only clypeus and a transverse area at rear of vertex impunctate. Pronotum fairly large, the sides retracted in almost straight lines to narrow base; lateral line bordered only in anterior half; puncturation dense, the punctures as large as larger punctures of head; a pair of discal series of 6-8 punctures each extend from near base to 2/3 rds its length, the anterior half of discal series enclosing a double column of punctures that extends almost to anterior margin, with numerous punctures on sides and lateral margin. Elytra small, with humeral angles reduced but not entirely obsolete; disc entirely densely punctate, the interstices almost everywhere narrower than diameter of punctures, the punctures as large as those of pronotum. Puncturation of abdomen disposed randomly, dense, the punctures as large as those of elytra.

Male: sternite VII with a median keel in the shape of an inverted U enclosing an impunctate area before scarcely emarginate posterior margin; sternite VIII: Fig. 43s8, the surface with an oblique arcuate keel extending from near base at centre to the left above shallow emargination of posterior margin; aedoeagus: Figs 43arl, (inner sac everted and sclerotised structures extruded in type).

Female: sternite IX: Fig. 43vp.

Variability: the pronotum and elytra of specimens from various localities in north Thailand are slightly longer and narrower than in the type from the neighbouring Karen Hills of Burma, which slightly alters the facies, but there are no significant differences in the male sexual characters. The ventral processes of the median lobe of the specimen from Huay Nam Dang in MHNG (Fig. 43arl2) appear to be different from those of other males; I assume that they are displaced (the inner sac of this specimen is also everted), because the specimen is externally indistinguishable from other specimens from north Thailand, and the distinctive male secondary sexual characters are identical.

Key 3.

The locality of the last specimen listed above is the Meo village on Doi Pui, Chiang Mai.