Bioramix (Leipopleura) baqenensis 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 : 30-31

Taxon classification Animalia Coleoptera Tenebrionidae

Bioramix (Leipopleura) baqenensis Li & Egorov sp. n. Figs 1-10, 31-32

Type material.

Holotype: male, CHINA: Tibet, Baqen, 31°50.421'N, 094°18.016'E, 4575 m, 3 Jul. 2010, Ai-Min Shi and Yong-Sheng Pan leg. (MCWNU). Paratype: 21 males and 20 females, 4 paratypes (2 males, 2 females) in ZIN, same data as the holotype.

Diagnosis.

This new species can be distinguished based on the following: anterior margin of pronotum straight; protibia outer apical angles strongly elongated, inner surface with an obscure spur and strong setae at apical ½; parameres moderately narrowed apically, slightly sinuate near the apex ⅕ (in lateral view).

Etymology.

Named after the type locality, Baqen.

Description.

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

Male (Figs 1-8). Head broad, anterior margin of clypeus straight, fronto-clypeal suture slightly obscure; most of genae densely punctate, covered with recumbent hairs. Dorsal surface of head slight convex. Punctation of head fine, dense or moderately dense. Eyes transverse, with shallow emargination at anterior margin. Antennae when posteriorly extended, reaching pronotal base. Length (width) ratio of antennomeres from 2nd to 11th as follows: 14.0(11): 25.5(12.5): 14.0(12.5): 13.5(11.5): 15.0(12.0): 14.5(13.0): 17.5(15.0): 15.5(15.0): 15.5(15.5): 20.5(16.0) (n = 5).

Pronotum (Fig. 2) transverse, 1.35-1.51 (1.44 on average, n = 5) times as wide as long, widest before the middle, 1.72-1.82 (1.78 on average, n = 5) times as wide as head. Ratio of pronotal width at anterior margin to its maximum width and width at base (n = 5) 0.69: 1.00: 0.95 on average. Outer margin of pronotum shallowly sinuate in basal ½, more abruptly converging anteriorly in anterior ⅓, finely bordered along entire length. Anterior margin straight, bordered laterally; base weakly bisinuate, not bordered or bordered laterally. Anterior angles of pronotum widely obtuse; posterior ones nearly rectangular. Pronotal surface between outer margins convex, punctures larger 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, 1.32-1.43 (1.36 on average, n=5) times as long as wide, maximum width before middle, 1.23-1.27 (1.25 on average, n=5) 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 fine dense punctation and minute rugae, with traces of longitudinal prominences and also traces of smooth rounded prominences better developed in apical half. Epipleural surface with densely covered irregular wrinkles and small granules. 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, 4th ventrite weakly concave at sides. Last abdominal ventrite with shallow depression and impunctate semicircular area at medial base.

Legs (Figs 3-5) robust, length (width) ratio of pro-, meso- and metafemora 69.0(25.0): 73.5(22.5): 88.0(24.5) (n = 5); that of corresponding tibiae 67.0(27.0): 63.5(17.5): 88.0(18.0) (n = 5). Protibiae 2.37-2.59 (2.49 on average, n = 5) times as long as wide, gradually widening in basal ⅔. Outer apical angles strongly elongate, underside concave. Inner surface with an obscure spur and strong setae in apical ½. Metatibia straight. 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 (7.0): 11.0 (15.5): 8.5 (14.5): 4.5 (12.5) (n = 5), 10.0 (8.0): 9.5(12.5): 7.0 (11.0): 5.0 (7.5) (n = 5) and 27.5 (6.5): 13.5 (6.0): 11.5 (5.5): 21.0 (5.0) (n = 5).

Aedeagus (Figs 6-8): length 2.9-3.0 mm, width 0.83 mm. Parameres 1.17 mm long and 0.67 mm wide, moderately narrowed apically, apical ⅕ slightly sinuate (in lateral view).

Female (Figs 9-10). Body wider. Antennae and epipleural carina shorter than in male. Pronotum 1.60-1.72 (1.65 on average, n = 5) times as wide as long, 1.76-1.81 (1.78 on average, n = 5) times as wide as head. Ratio of pronotal width at anterior margin to its maximum width and width at base 0.71: 1.00: 0.95. Elytra 1.27-1.35 (1.32 on average, n = 5) times as long as wide, 1.29-1.40 (1.35 on average, n = 5) times as wide as pronotum. Plantar surface of pro- and mesotarsomeres without setal brush. Ovipositor in dorsal view with golden setae at apical ⅓, tuft of setae (with 3-4 long setae) present near apical margin.

Measurements.

Male body length 9.3-10.4 mm, width 4.7-5.0 mm; female body length 9.1-9.8 mm, width 4.7-5.2 mm.

Distribution.

China: Tibet (Tanggula Shan, Baqen).

Remarks.

Bioramix (Leipopleura) baqenensis Li & Egorov, sp. n. is similar to Bioramix (Leipopleura) nagquana (Meng & Ren, 2005) based on the following characters: length of antennae (when posteriorly extended, reaching pronotal base), anterior margin of clypeus straight, pronotum widest near middle, and metatibia straight.