Bioramix (Leipopleura) cupreoviridis, Bai & Ren, 2020

Bai, Xing-Long & Ren, Guo-Dong, 2020, Revision of the genus Bioramix Bates, 1879 (Coleoptera: Tenebrionidae: Platyscelidini) from China, Zootaxa 4815 (1), pp. 1-102 : 23-25

Bioramix (Leipopleura) cupreoviridis sp. nov.

( Figs 7 , 68–69 , 229–230 )

Description. Body brownness, shining, antennae, palpi and tarsi brown, elytral surface with metallic sheen.

Male ( Figs 7 , 68–69 , 229 ). Head. Anterior margin of epistome straight, surface with dense and coarse punctures. Frons and genae weakly convex, surface with dense and coarse punctures. Dorsal surface of head with dense and coarse punctures. Eyes transverse, anterior margin shallowly emarginate. Antennae ( Fig. 7 : A) not reaching pronotal base, antennomeres II–VIII short cylindrical and thicker at apex, IX–X nearly spherical, XI sharped-oval. Length (width) ratio of antennomeres II–XI 12 (12): 24 (13): 17 (12): 15 (12): 14 (11): 14 (11): 18 (13): 16 (13): 14 (14): 13 (13).

Prothorax. Pronotum ( Fig. 7 : B) transverse and weakly convex, 1.5 times as wide as long and 1.8 times as wide as head. Lateral sides widest anterior to base, arcuately narrowing toward base and apex. Ratio of width at anterior margin to widest part and base 26: 41: 40. Anterior margin nearly straight, posterior one protruding backward. Anterior and posterior angles obtuse. Anterior and posterior margins edged laterally, entire lateral margins edged. Dorsal surface with sparse and fine punctures on disc, denser and coarser at sides. Lateral sides flattened. Prothoracic hypomera with longitudinal wrinkles and sparse yellow setae. Prosternum anterior to procoxae with yellow setae, prosternal process sharply sloping behind procoxae, apex not projecting beyond level of procoxae in lateral view.

Pterothorax. Elytra elongate-oval and weakly flattened, 1.4 times as long as wide and 1.2 times as wide as pronotum, base slightly wider than pronotum and widest at middle. Surface with sparse and fine punctures, fine wrinkles, traces of longitudinal carinae. Lateral margins of elytra not reaching sutural angle, interrupted at middle, invisible in dorsal view.

Abdomen with dense yellow setae, ventrites 1–2 weakly depressed at middle.

Legs. Profemora stout, with sparse punctures and yellow setae. Protibiae ( Fig. 7 : D) gradually widened toward apex, underside concave at apex, apical margin foliate extended, inner side with dense yellow hairbrush from middle to apex. Protarsi ( Fig. 7 : C) narrower than apex of protibiae. Meso- and metafemora longer than profemora. Mesotibiae ( Fig. 7 : E) gradually widened toward apex, with yellow setae and rufous thick setae. Mesotarsi ( Fig. 7 : F) narrower than apex of mesotibiae. Metatibiae ( Fig. 7 : G) curved, with yellow setae and rufous thick setae. Length (width) ratio of pro-, meso- and metafemora 17 (9): 22 (7): 27 (8), that of corresponding tibiae 19 (8): 20 (6): 30 (5), and protarsi 26 (28): 56 (34): 48 (25): 35 (14): 46 (21), mesotarsi 28 (29): 48 (30): 42 (25): 28 (16): 56 (22), metatarsi ( Fig. 7 : H) 72 (24): 41 (24): 28 (23): 62 (22).

Aedeagus ( Figs 7 : I–J, 68–69) 2.8 mm long and 0.8 mm wide. Parameres 1.1 mm long and 0.6 mm wide, widest at base and narrowing toward apex, lateral sides weakly emarginate posterior to apex in dorsal view, distal part curved dorsally in lateral view.

Female ( Fig. 230 ). Body wider, abdominal ventrites 1–2 neither depressed nor flattened at middle, pro- and mesotarsi not widened, other characters similar to male.

Measurements. Body length: ♂ 9.4–10.3 mm, ♀ 9.4–10.4 mm and width: ♂ 4.9–5.0 mm, ♀ 4.5–5.4 mm.

Type material. Holotype: ♂ ( MHBU), CHINA : Xizang: Riyue Religion , [Pundam Town], Namling County, 30.0227° N, 89.0888° E, 4350 m, 3.VIII.2009, Guo-Dong Ren et al. leg . Paratypes: 127♂♂, 120♀♀ ( MHBU), same data as holotype ; 1♂ ( MHBU), Xainza County, 30.9620° N, 88.7609° E, 4878 m, 4.VIII.2009, Guo-Dong Ren, Yi-Bin Ba & Yong Zhou leg.

Distribution. China: Xizang.

Diagnosis. This new species is similar to Bioramix (Leipopleura) baxoica sp. nov. (see diagnosis of B. baxoica ), Bioramix (Leipopleura) rugelytra sp. nov. (see diagnosis of B. rugelytra ) and Bioramix (Leipopleura) kochi ( Kaszab, 1940) , but can be distinguished from the latter by the following characters (based on male): (1) pronotum widest just anterior to base, posterior margin protruding backward, lateral sides more weakly flattened (posterior to middle, nearly straight, widely flattened in B. kochi ); (2) elytral surface more flattened, lateral margins not reaching sutural angle (more convex, reaching in B. kochi ).

Etymology. This species name is derived from its aeruginous metallic sheen on the elytral surface.

Figures

FIGURES 7–8. Characters. 7. Bioramix cupreoviridis (male), 8. B. exsertigenae (male): A. antenna; B. pronotum; C. protarsi; D. protibiae; E. mesotibiae; F. mesotarsi; G. metatibiae; H. metatarsi; I–J. aedeagus in dorsal and lateral view.

FIGURES 49–73. Parameres of male aedeagus in dorsal and lateral view. 49–50. Bioramix splendida; 51–52. B. subaenescens; 53–55. B. szetschuana; 56–57. B. kulzeri (= B. szetschuana, photograph by Christoph Germann, without measuring scale); 58–59. B. tenuitarsus; 60–61. B. aenescens; 62–63. B. banbarensis; 64–65. B. baxoica; 66–67. B. crypticoides; 68–69. B. cupreoviridis; 70–71. B. exsertigenae; 72–73. B. frivaldszkyi.

FIGURES 226–231. Habitus. 226. Bioramix baxoica (female, paratype); 227–228. B. crypticoides (males; 227. lectotype); 229–230. B. cupreoviridis (229. male, holotype; 230. female, paratype); 231. B. exsertigenae (male, holotype).