Ocychinuus caeruleatus SMETANA

Smetana, A., 2014, Contributions to the knowledge of the " Staphylinus-complex " of China. Part 26. The genus Ocychinus S 2003, section 4. Two new species of Ocychinus, one of them the first representative of the genus in the Himalaya (Coleoptera: Staphylinidae: Staphylininae: Staphylinini), Linzer biologische Beiträge 46 (1), pp. 649-654 : 653-654

publication ID	https://doi.org/ 10.5281/zenodo.10272820
DOI	https://doi.org/10.5281/zenodo.5468178
persistent identifier	https://treatment.plazi.org/id/03A38B72-6003-D461-26C7-FE08FCE423BE
treatment provided by	Marcus
scientific name	Ocychinuus caeruleatus SMETANA
status	sp. nov.

Treatment

Ocychinuus caeruleatus SMETANA nov.sp. ( Figs. 2, 4 View Figs 1-4 , 6 View Figs 5, 6 )

T y p e l o c a l i t y. China, Yunnan, Dulong & No Minority County, Gongshan, Bingzhongluo Co., Siji Tong, Chukuai Lake, 27.97944N 098.47720E, 3715 m.

T y p e m a t e r i a l. Holotype female: " Chukuai Lake Siji Tong Bingzhongluo C. Gongshan Dulong & Nu Minority County / Yunnan Prov. Alt. 3715 m N27.97944 E098.47720 18-VIII-2054 LIU Ye Leg.". In the collection of the Department of Biology , Shanghai Normal University , Shanghai , Peoples Republic of China. GoogleMaps

D i a g n o s i s. Ocychinus caeruleatus differs from the three species of Ocychinus with blue elytra and black appendages known at present ( O. yeti , O. tibetanus SMETANA 2003 and O. capitalis SMETANA 2003 ) by the double punctation of the head, featuring coarse and fine punctures ( Fig. 4 View Figs 1-4 ).

D e s c r i p t i o n. Black, fore body shiny, elytra dull dark blue, tergite 10 of genital segment brunneous; maxillary and labial palpi brunneopiceous, mandibles dark rufobrunneous, labrum rufobrunneous with yellowish margins; antenna (except for reddish base of second segment) and legs black, legs with somewhat paler tarsi ( Fig. 6 View Figs 5, 6 ). Head of rounded quadrangular shape, with entirely rounded posterior angles, vaguely dilated posteriad, wider than long (ratio 1.24); eyes small, almost flat, tempora considerably longer than eyes from above (ratio 1.54); punctation of dorsal surface of head double, composed of irregularly spaced, moderately coarse punctures and intermixed fine punctures, vertex of head almost without punctures; tempora each with numerous coarse punctures extending anteriad along medial margin of each eye and with some fine punctures, each bearing short seta; dorsal surface of head with fine microsculpture of waves becoming coarser and submeshed along posterior margin of head and particularly on tempora; dorsal surface of neck with sparse fine punctures and rudimentary microsculpture. Antenna moderately long, segment 3 vaguely longer than segment 2 (ratio 1.14), segments 4-8 longer than wide, becoming gradually shorter, 9 and 10 about as long as wide, last segment markedly shorter than two preceding segments combined. Pronotum about as long as wide with rounded base, slightly narrowed anteriad, narrow marginal groove disappearing downward at about anterior third of pronotal length; disc of pronotum without appreciable impunctate midline; punctation extremely fine and irregularly spaced, lateral portions each with several coarse punctures, disc without microsculpture, but rudimentary microsculpture gradually appearing toward anterior and both lateral portions of pronotum. Scutellum sparingly punctate and pubescent, with fine, dense microsculpture. Elytra relatively long, vaguely widened posteriad, at suture vaguely shorter (ratio 0.93), at sides vaguely longer (ratio 1.07) than pronotum at midline; punctation very fine and moderately dense, becoming gradually somewhat denser toward lateral margins, interspaces between punctures mostly distinctly larger than diameters of punctures; surface of elytra appearing quite dull due to dense, granulose microsculpture; pubescence piceous. Abdomen with fifth visible tergite with fine, pale apical seam of palisade fringe; tergite 2 (in front of first fully visible tergite) with a few very fine punctures near posterior margin; all abdominal tergites with punctation and pubescence similar to those on elytra but somewhat less fine, gradually becoming markedly sparser toward apex of abdomen; interspaces between punctures with extremely fine, dense microsculpture of transverse striae.

Female. Tergite 10 of genital segment as in Fig. 2 View Figs 1-4 .

Male unknown.

Length 12.0 mm.

G e o g r a p h i c a l d i s t r i b u t i o n. Ocychinus caeruleatus is at present known only from the type locality in northwesternmost Yunnan.

Bionomics. Nothing is known about the collecting circumstances of the holotype.

C o m m e n t s. Segments 4-11 of the left antenna are broken off, they are glued separately on the plate with the beetle.

E t y m o l o g y. The specific epithet is the Latin adjective caeruleatus, - a, - um (dark blue, sky blue). It refers to the color of the elytra of the species.