Ochthephilus tibetanus, Makranczy, 2014

Makranczy, György, 2014, Revision of the genus Ochthephilus Mulsant & Rey, 1856 (Coleoptera: Staphylinidae, Oxytelinae), Revue suisse de Zoologie 121 (4), pp. 457-694 : 514-516

Ochthephilus tibetanus sp. nov. Figs 101-105, 120-121, 152-153, 171-172

TYPE MATERIAL: HOLOTYPE (3): “ CHINA: TIBET [= XIZANG]: Shigatse, Tsangpoufer , 3900m, 29°15'43.6" N, 88°52'09.3" E, 31.VII.1998, leg. O. Jäger ” ( SMTD) . – PARATYPES (12): same data as holotype ( SMTD, 4♀, MHNG, 1, NHMW, 1♀). – “ Zhalangxian [Zhanang Co.] [+29.25/+91.34], 3600m, 14.VIII.1960, leg. C.-G. Wang ” ( IZAS, 13, 1♀, 1). – “Lhasa [+29.65/+91.14], 3660m, 3.V.1960, leg. C.-G. Wang ” ( IZAS, 1); same but 15.V.1960 ( IZAS, 1). – “Mozhugongkaxian [ Maizhokunggar Co. ] [+29.83/+91.73], 5.VII.2002, leg. Y.-B. Ba & Y. Yu ” ( IZAS, 1) .

DESCRIPTION: Measurements (n=10): HW = 0.63 (0.61-0.65); TW = 0.54 (0.52- 0.56); PW = 0.64 (0.62-0.68); SW = 0.90 (0.84-0.99); AW = 0.99 (0.90-1.06); HL = 0.48 (0.46-0.52); EL = 0.22 (0.21-0.23); TL = 0.10 (0.08-0.10); PL = 0.52 (0.50-0.54); SL = 1.16 (0.12-1.20); SC = 1.06 (1.00-1.15); FB = 2.23 (2.12-2.32); BL = 3.78 (3.20- 4.00) mm. Head, pronotum and abdomen blackish dark brown, elytra dark brown with a broad stripe at apex slightly more blackish as well as scutellar area to shoulders. Antennae, mouthparts and legs dark brown, middle of tibiae darker than both ends. Body with moderate lustre due to very dense elytral setation and fine but dense punctation all over. Pubescence short and sparse, but abdomen with much longer setae. Elytral apex without conspicuous setae. Last tarsomere rather densely (and finely) setose.

Forebody. Antenna as in Fig. 121, antennomere 7 (and in lesser extent article 8) asymmetrically swollen on one side. Clypeus (Fig. 171) sparsely punctate (colliculate microsculptured), trapezoid, corners rounded, anterior edge gently arched; separated by impressed transversal line (frontoclypeal suture) across a shinier area. Supraantennal prominences well developed, feebly separated from clypeus/vertex by impressions. Vertex with oblique impressions in middle almost joining in V-shape. Temples (Fig. 120) slightly bulging, evenly curved, little shorter than half of eye length. Neck separated by an impressed transversal groove, microsculpture much stronger than on head, with transverse cells, no setation. Pronotum with a narrow marginal bead, visible to anterior pronotal corners. Posterior pronotal angles well-formed, just slightly obtuse-angled, sides in the posterior 2/3 very gently concave. 'Anchor' rather weakly formed, more apparent in the longitudinal midline as an elevated, impunctate, unsculptured (shinier) line, parallel to this line two gentle, semilongitudinal elongate elevations in anterior half of disc. In the corners of the anchor slight elongate impressions directed outwards. Elytra (Fig. 172) slightly broadening posteriorly, sutural corners broadly rounded; apical sides slightly oblique and in inner halves gently convex. Elytral surface rather even with two shallow, very elongate

FIGS 179-193

(179-183) Ochthephiluslegrosi (Jarrige); aedeagus (179), innersclerites (180-181), female ringstructures (182-183). (184-188) O. tatricus (Smetana) ; aedeagus (184), innersclerites (185-186), femaleringstructures (187-188). (189-193) O. brachypterus (Jeannel & Jarrige) ; aedeagus (189), innersclerites (190-191), femaleringstructures (192-193). Scalebar = 0.05 mm for 187-188, 192-193, 0.06 mmfor 182-183, 0.1 mmfor 184-186, 0.13 mmfor 179-181, 189-191.

impressions behind scutellum. Head with fine coriaceous/colliculate microsculpture, fading on elevated parts, stronger in impressions, on pronotum microsculpture slightly stronger and more even. Punctation on head sparse, mostly confined to posterior part and sides, on pronotum more evenly spaced, average interspaces much larger than puncture diameters; elytral punctation more even and regularly spaced, average interspaces (with indistinct coriaceous microsculpture) about as puncture diameters, punctures discrete.

Abdomen. Compared to forebody, abdomen with much more sparse, finer, less distinct punctation, microsculpture on tergal apices fine coriaceous with moderately transverse cells. Tergite VII posterior margin with palisade fringe unmodified in middle (nearly uniform breadth). Tergite VIII basal edge evenly arched, with small concavity in middle of basal sclerotized band; apical edge with sinuate (protruding) corners, and broad, moderately deep emargination in between. Sternite VIII with rounded apical corners, apex in males shallowly concave laterally, gently sinuate in middle; in females slightly more sinuate (convex) in middle. Tergite X modified, apex with a few, moderately deep emarginations, broader in males (Fig. 152) more narrow in females (Fig. 153). Aedeagus as in Fig. 101, inner sclerites as in Figs 102-103. Female ringstructures as in Figs 104-105.

ETYMOLOGY: The species is named after the locality of the known specimens.

COMPARATIVE NOTES: This is currently the only species known from Tibet. From its closest relatives it can be separated by its slender body and particularly elongate elytra. A similar species (with uniformly dark body) is O. japonicus , currently only known from Japan. Distribution range can come close to that of O. davidi , from which it can be separated by genital features.

DISTRIBUTION: At present known from Tibet, where it does not seem to be rare.

BIONOMICS: No bionomical data are recorded for any of its known specimens, the locality records suggest occurence on streambanks.

IV. Ochthephilus aureus species group