Bioramix (Leipopleura) nyainrongensis Li & Egorov

Li, Yun-Chun, Egorov, L. V. & Shi, Ai-Min, 2016, Three new species of the subgenus Leipopleura Seidlitz from Tibet, China (Coleoptera, Tenebrionidae, Bioramix Bates), ZooKeys 609, pp. 29-41 : 31-34

Taxon classification Animalia Coleoptera Tenebrionidae

Bioramix (Leipopleura) nyainrongensis Li & Egorov sp. n. Figs 11-20, 33-34

Type material.

Holotype: male, CHINA: Tibet, Nyainrong, 32°06.763'N, 92°17.171'E, 4728 m, 6 Aug. 2010, Yun-Chun Li and Yong-Sheng Pan leg. (MCWNU). Paratype: 4 males and 3 females, 3 paratypes (2 males, 1 females) in ZIN, same data as the holotype.

Diagnosis.

This new species can be distinguished based on the following: shorter antennae (when posteriorly extended, not reaching pronotal base); anterior margin of pronotum emarginated, and metatibia weakly incurved.

Etymology.

Named after the type locality, Nyainrong.

Description.

Body black; antennae, legs and palps brown; surface weakly shiny.

Male (Figs 11-18). Head broad, anterior margin of clypeus weakly, but noticeably arcuate in the middle; fronto-clypeal suture slightly obscure; most of genae densely punctate, covered with recumbent hairs. Dorsal surface of head slight convex. Punctation of head coarse large, dense or moderately dense. Antennae very shorter, when posteriorly extended, not reaching posterior ½ of pronotum. Length (width) ratio of antennomeres from 2nd to 11th as follows: 11.7(10.3): 20.7(10.0): 12.7(9.3): 12.3(10.0): 13.7(10.3): 13.3(10.3): 14.0(13.3): 12.0(13.0): 13.0(14.0): 17.0(14.7) (n = 3).

Pronotum (Fig. 12) transverse, 1.49-1.63 (1.55 on average, n = 3) times as wide as long, widest before in the middle, 1.75-1.87 (1.83 on average, n = 3) times as wide as head. Ratio of pronotal width at anterior margin to its maximum width and width at base (n = 3) 0.66: 1.00: 0.96 on average. Outer margins of pronotum acutely convex, bordered along entire length. Anterior margin emarginate, bordered laterally; base weakly bisinuate, not bordered or bordered laterally. Anterior angles weakly obtuse; posterior ones nearly rectangular. Pronotal surface between outer margins convex, punctures smaller and denser than those on head, finer at disc than laterally, lateral margins of pronotum weakly flattened. Intercoxal process not raised, sharply sloping behind procoxae. Prothoracic hypomeron with longitudinal wrinkles.

Elytra elongate-oval, 1.27-1.33 (1.30 on average, n = 3) times as long as wide, maximum width before middle, 1.10-1.20 (1.14 on average, n = 3) times as wide as pronotum. Outer margin of epipleural reaching sutural angle, visible dorsally only at base. Elytral surface between epipleura and sutural margin convex, with traces of longitudinal carina, elytra apex sharply declined. Epipleural surface covered with dense irregular wrinkles and sparse shallow punctures. Lateral carina of elytra (outer margin of pseudepipleura) visible in dorsal view only anteriorly, explanate on humeri, merging with epipleura, reaching sutural angle. Mesoventrite with rather sparse recumbent hairs; surface finely granulate and wrinkles. Abdominal ventrites with yellow hairs. intercoxal process of abdomen rounded apically. First and second abdominal ventrites with shallow medial impressions.

Legs (Figs 13-15), length (width) ratio of pro-, meso- and metafemora 53.3(19.7): 59.7(18.7): 70.7(19.3) (n = 3); that of corresponding tibiae 53.3(20.7): 54.3(14.0): 72.7(14.3) (n = 3). Protibiae 2.55-2.60 (2.58 on average, n = 3) times as long as wide, gradually widening towards apex, Outer apical angles weakly elongate, underside concave. pro-, meso- and metatibiae with densely golden hairs at apex of inner surface, protibiae with obviously a spur. metatibia weakly incurved. Plantar surface of proximal pro- and mesotarsomeres 1-4 with setal brushes. Length (width) ratio of pro-, meso- and metatarsomeres from 1st to 4th as follows: 8.0(6.7): 7.7 (13.3): 6.3 (13.7): 4.7 (10.0) (n = 3), 8.0 (7.0): 8.0 (12.3): 6.3 (10.0): 4.7 (6.3) (n = 3) and 21.7 (6.7): 10.3 (6.0): 8.3 (5.7): 16.0 (6.0) (n = 3).

Aedeagus (Figs 16-18): length 2.4-2.5 mm, width 0.67 mm. Parameres 0.95 mm long and 0.57 mm wide. Parameres noticeably narrowed toward apex in dorsal view, but weakly widened in distal ¼, distinctly sinuate (in lateral view).

Female (Figs 19-20). Body longer and wider. Pronotum 1.57-1.59 (1.58 on average, n = 3) times as wide as long, 1.75-1.77 (1.76 on average, n = 3) times as wide as head. Ratio of pronotal width at anterior margin to its maximum width and width at base (n = 3) 0.67: 1.00: 0.98. Elytra 1.30-1.32 (1.31 on average, n = 3) times as long as wide, 1.19-1.21 (1.20 on average, n = 3) times as wide as pronotum. Plantar surface of pro- and mesotarsomeres without setal brush. Ovipositor in dorsal view with golden setae at apical ¼, and nearly apex shorter setae formation looped pile, within a strong long setae highlight, inner apical surface of with densely setae.

Measurements.

Male body length 7.9-8.1 mm, width 3.9-4.0 mm; female body length 8.1-8.2 mm, width 4.0-4.1 mm.

Distribution.

China: Tibet (Tanggula Shan, Nyainrong).

Remarks.

Bioramix (Leipopleura) nyainrongensis Li & Egorov, sp. n. is similar to Bioramix (Leipopleura) baqenensis Li & Egorov, sp. n. and Bioramix (Leipopleura) nagquana (Meng & Ren, 2005) based on the following characters: pronotum (widest near middle), posterior margin of pronotum base weakly bisinuate, elytra elongate-oval (widest near middle), and outer margin of epipleural visible dorsally only at base.