Omaliopsis smetanai, Shavrin, 2023

Shavrin, Alexey V., 2023, Four new species of the genus Omaliopsis Jeannel, 1940 (Coleoptera: Staphylinidae: Omaliinae: Omaliini) of China, Zootaxa 5380 (5), pp. 446-460 : 456-459

Omaliopsis smetanai sp. n.

( Figs 4 , 17 , 32–39 )

Type material. Holotype ♂ ( Fig. 4 ): ‘ CHINA, Sichuan, Gongga | Shan, above Camp 3 | 3050m, 22.VII.1994 | A. Smetana [C18]’ <printed; C18: sifting of mushrooms and moss and debris under them growing on a fallen Abies tree in an original Abies forest with Rhododendron undergrowth>, ‘HOLOTYPE | Omaliopsis | smetanai sp. n. | Shavrin A.V. des. 2023’ <red, printed> ( CNC).

Paratypes (30 ♂♂, 29 ♀♀): 24 ♂♂, 19 ♀♀: same data as the holotype (5 ♂♂, 4 ♀♀: cSh, 16 ♂♂, 13 ♀♀: CNC; 3 ♂♂, 2 ♀♀: MHNG); 1 ♂ (dissected), 1 ♀: ‘ CHINA: Sichuan Gongga | Shan, Hailuogou, Lake | above Camp 2, 2750 m | 29°35N 102°00E, 4.VII | 1998, A. Smetana [C74]’ <printed; C74: sifting of leaf litter and various debris in an original Betula , Acer , etc. forest>, ‘1998 China Expedition | J. Farkač, D. Král, | J. Schneider | & A. Smetana’ <printed> (1 ♂: cSh; 1 ♀: CNC); 2 ♀♀: ‘ CHINA: Sichuan Gongga | Shan, Hailuogou, for. | above Camp 2, 2800 m | 29°35N 102°00E, 5.VII. | 1998. A. Smetana [C75]’ <printed; C75: sifting of mushrooms on dead Betula trees, standing or lying on ground branches, etc.>, ‘1998 China Expedition | J. Farkač, D. Král, | J. Schneider | & A. Smetana’ <printed> ( CNC); 3 ♀♀: ‘ CHINA, Sichuan, | NW Heishui, 3428m | 32°11’29’’N, 102°39’30’’E | 14-20.VI.2018,leg. Reuter’ (cF); 2 ♀♀ (one specimen dissected): ‘ CHINA: Shaanxi Daba | Shan mtn. range N pass | 22km NW Zhenping’ <printed>, ‘ 32°01’N 109°21’E | 2850m 14. VII. 2001 | A. Smetana [C103]’ <printed> ( CNC); 3 ♂♂ (one specimen dissected): ‘ CHINA: N-Yunnan Zhong- | dian Co. 36km ESE Zhong- | dian 27°40.9’N 100°01.5’E | 3500-3550m 23.VIII.2003 | A. Smetana [C 133]’ <printed; C133: sifting of mushrooms and debris around and under them, leaf-litter, rotting wood and various other floor debris in an remnant of original Abies, Betula , Rhododendron forest> (1 ♂: cSh; 2 ♂♂: CNC); 1 ♀: ‘ CHINA: N-Yunnan Zhong- | dian Co. pass 28km ESE Zhong- | dian, 27°43.9’N 99°58.2’E | 3700-3750m 22.VIII.2003 | A. Smetana [C131]’ <printed; C131: sifting of leaf litter, rotting wood, moss and various floor debris, particularly around and under mushrooms in various stages of development in an degraded original Abies , Sorbus, Larix , Rhododendron forest with various deciduous shrubbery undergrowth> ( CNC); 2 ♂♂ (one specimen dissected), 1 ♀: ‘ CHINA: N-Yunnan [C03-12] | Zhongdian Co., pass 28 km ESE Zhong- | dian, devastated primary forest with | young Abies, Larix, Betula, Rhodod [endron]., | 27°43.9’ N, 99°58.2’E, 3700-3750m, | 22.VIII.2003, leg. M. Schülke’ <printed>, ‘Museum für Naturkunde | Berlin | Sammlung M. Schülke’ <printed> (cSch). All paratypes with additional red printed label: ‘ PARATYPE | Omaliopsis | smetanai sp. n. | Shavrin A.V. des. 2023’.

Description. Measurements (n=60): HW: 0.47–0.52; HL: 0.35–0.39; OL: 0.17–0.20; TL: 0.05–0.06; AL (holotype): 0.68; PL: 0.37–0.42; PW: 0.62–0.75; ESL: 0.85–0.99; EW: 0.85–1.02; MTbL (holotype): 0.37; MTrL (holotype): 0.25 (MTrL 1–4: 0.10; MTrL 5: 0.15); AW: 0.82–0.95; AedL: 0.57–0.70; BL: 2.45–3.42 (holotype: 2.55).

Habitus as in Fig. 4 . Body yellow-brown to reddish-brown, with darker head, middle portion of pronotum and abdomen; each elytron with darkened basal portions and wide moderately large darkened spot in medioapical part (some paratypes without these spots but with entirely darkened medioapical and lateroapical portions of elytra); antennomeres 6–11 brown; basal and lateral margins of pronotum, middle portion of elytra, legs, paratergites and apical abdominal tergites yellowish; mouthparts, antennomeres 1–5 and tarsi yellow. Punctation of head irregular and sparse, denser and larger in middle, some specimens forming narrow band of spots in middle between eyes; punctation of pronotum moderately large and deep, denser than that on head, sparser and finer in middle and especially in mediobasal portion; punctation of elytra dense, distinctly larger and deeper than that on pronotum, finer and sparser around scutellum and along suture or denser and coarser in mediobasal portion. Head with dense microreticulation, transverse in middle and subdiagonal or isodiametric on infraorbital portions; pronotum with dense transverse microsculpture, finer in mediobasal portion.

Head 1.3 times as broad as long, with moderately narrow frontoclypeal portion and distinctly convex supra-antennal elevations, with wide and moderately deep anteriomedian depressions and with variable and deep anteocellar foveae: short, about as long as diameter of ocellus or distinctly longer and slightly convergent lateroanteriad. Ocelli located at level or slightly behind levels of posterior margins of eyes; distance between ocelli slightly greater than distance between ocellus and posterior margin of eye. Antennomere 5 slightly shorter and broader than 4, 7 slightly longer and broader than 6, 8–10 slightly longer and distinctly broader than 7.

Pronotum 1.6–1.7 times as broad as long, 1.3–1.4 times as broad as head, widest in middle, more narrowed posteriad than anteriad, usually with slightly and widely concaved laterobasal margins; surface of disc with two long and wide longitudinal depressions.

Elytra about as long as broad, distinctly more than twice as long as pronotum, slightly broadened posteriad.

Abdomen slightly narrower than elytra.

Male. Posterior margin of abdominal tergite VIII rounded ( Fig. 34 ). Posterior margin of abdominal sternite VIII widely emarginate ( Fig. 35 ). Aedeagus with moderately wide basal portion, gradually narrowed toward small rounded apex; parameres narrow, slightly broadened apically and slightly not exceeding apex of median lobe, with two moderately long apical setae; internal sac long and wide, with two large elongate and curved transverse sclerites in basal portion ( Fig. 32 ). Lateral aspect of the aedeagus as in Fig. 33 .

Female. Posterior margin of abdominal tergite VIII ( Fig. 36 ) and sternite VIII ( Fig. 37 ) truncate. Female accessory sclerite long and moderately wide, from widest basal portions slightly narrowing toward rounded apex ( Fig. 38 ). Spermatheca as in Fig. 39 .

Comparative notes. Based on the general shapes of the forebody and the aedeagus, and the lack of postocular ridges, O. smetanai sp. n. is similar to O. fraterna sp. n., O. hlavaci sp. n. and O. obliquisignata sp. n. From O. fraterna sp. n. it differs by the paler coloration of the elytra, finer and sparser punctation of the head and the pronotum, and slightly broader apical portions of the parameres. From O. hlavaci sp. n. it differs by the paler coloration of the body, sparser punctation of the head and the pronotum, slightly broader and longer elytra, narrower apical portion of the median lobe and slightly broader apical portions of the parameres. From O. obliquisignata sp. n. it differs by the slightly longer elytra. From all these species, O. smetanai sp. n. can be distinguished by the coloration of the elytra, details of the structure of the internal sac and the shape of the female accessory sclerite. For additional detail see the key below.

Distribution. The new species is known from several locations in Gongga Shan and Heishui in Sichuan, Daba Shan in Shaanxi, and Zhongdian in Yunnan, China ( Fig. 17 ).

Etymology. The species is named after the memory of my colleague Aleš Smetana (1931-2021), who collected the most part of type specimens.

Bionomics. Specimens were collected at elevations from 2750 to 3750 m a.s.l. Specimens were taken by sifting leaf litter, mushrooms, mosses and debris in mixed forests ( Abies, Larix, Betula, Rhodendron , etc.).

Figures

FIGURE 17. Distribution of Omaliopsis in China: O. fraterna (circles), O. hlavaci (triangles), O. obliquesignata (black star), O. smetanai (diamonds).

FIGURES 1–4. Habitus of Omaliopsis: 1—O. fraterna (holotype), 2—O. hlavaci (holotype), 3—O. obliquesignata (holotype), 4—O. smetanai (holotype). Scale bars: 1.0 mm.

FIGURES 32–39. Omaliopsis smetanai: 32–aedeagus, parameral view, 33–aedeagus, lateral view, 34–male tergite VIII, 35– male sternite VIII, 36–female tergite VIII, 37–female sternite 8, 38–female accessory sclerite, 39–spermatheca. Scale bar: 0.1 mm.