Bioramix (Leipopleura) homoplasta, 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 : 27-28

Bioramix (Leipopleura) homoplasta sp. nov.

( Figs 9 , 74–75 , 234–235 )

Description. Body black, weakly shining.

Male ( Figs 9 , 74–75 , 234 ). Head. Anterior margin of epistome straight, surface with dense and coarse punctures. Frons flattened 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. 9 : A) almost 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 17 (13): 24 (15): 19 (14): 20 (15): 22 (14): 20 (14): 25 (18): 23 (19): 22 (22): 31 (20).

Prothorax. Pronotum ( Fig. 9 : B) transverse and convex, 1.5 times as wide as long and 2.0 times as wide as head. Lateral sides widest at base, nearly straight narrowing toward apex. Ratio of width at anterior margin to basal 20: 36. Anterior margin weakly emarginate, posterior one nearly straight. Anterior angles obtuse, posterior ones rectangular. Anterior and posterior margins edged laterally, entire lateral margins edged. Dorsal surface with dense and coarse punctures. Lateral sides narrowly depressed at middle. 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 convex, 1.3 times as long as wide and 1.1 times as wide as pronotum, base slightly wider than pronotum and widest at middle. Surface with shallowly sparse, fine punctures and dense wrinkles. Lateral margins of elytra merging with outer margins of epipleura anterior to apex of elytra and reaching sutural angle, visible at middle 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. 9 : D) gradually widened toward apex, underside concave at apex, inner side and outside margins straight, inner side with dense yellow hairbrush from middle to apex. Protarsi ( Fig. 9 : C) narrower than apex of protibiae. Meso- and metafemora longer than profemora. Mesotibiae ( Fig. 9 : E) gradually widened toward apex, with rufous thick setae, inner side with dense yellow hairbrush from middle to apex. Mesotarsi ( Fig. 9 : F) nearly as wide as protarsi, narrower than apex of mesotibiae. Metatibiae ( Fig. 9 : G) weakly curved, with rufous thick setae, inner side with dense yellow hairbrush from middle to apex. Length (width) ratio of pro-, meso- and metafemora 18 (6): 19 (6): 23 (7), that of corresponding tibiae 16 (6): 18 (5): 26 (5), and protarsi 18 (26): 34 (51): 22 (49): 12 (28): 51 (16), mesotarsi 26 (29): 30 (44): 22 (39): 15 (24): 41 (17), metatarsi ( Fig. 9 : H) 71 (21): 36 (19): 28 (17): 50 (16).

Aedeagus ( Figs 9 : I–J, 74–75) 2.2 mm long and 0.6 mm wide. Parameres 0.9 mm long and 0.5 mm wide, widest at base and narrowing toward apex, lateral sides slightly emarginate posterior to apex in dorsal view, distal part straight in lateral view.

Female ( Fig. 235 ). Body wider, antennae not reaching pronotal base, abdominal ventrites 1–2 neither depressed nor flattened at middle, pro- and mesotarsi not widened, other characters similar to male.

Measurements. Body length: ♂ 7.7–8.7 mm, ♀ 8.3 mm and width: ♂ 3.8–4.0 mm, ♀ 4.4 mm.

Type material. Holotype: ♂ ( MHBU), CHINA : Qinghai: Zadoi County, 4400 m, 4.VII.2008 , Guo-Dong Ren et al. leg . Paratypes: 1♂, 4♀♀ ( MHBU), same data as holotype ; 1♂ ( MHBU), Yushu County, 2.VI.1963, Xiang-Chu Yin leg. , coll. NWIPB; 1♂ ( MHBU), Shanglaxiu Township , Yushu County, 32°57.835′ N, 96°17.330′ E, 4388 m, 21.VII.2012 , Guo-Dong Ren et al. leg .; 2♂♂, 1♀ ( MHBU), Ganda Village, Gyêgu Town, Yushu Zhou [equivalent to City], 33°05.257′ N, 96°48.324′ E, 4008 m, 24.VII.2019, Guo-Dong Ren, Xing-Long Bai, Ya-Lin Li, Ming-Min Ma & He Shi leg. ; 1♀ ( MHBU), Nangqên County, 4000 m, 5.VII.2008 , Guo-Dong Ren et al. leg .; 1♂, 1♀ ( MHBU), Chengwen Town , Chindu County, 33.3416° N, 97.1782° E, 3996 m, 17.VII.2009, Guo-Dong Ren, Yi-Bin Ba & Yong Zhou leg.

Distribution. China: Qinghai.

Diagnosis. This new species is similar to Bioramix (Leipopleura) latitarsis sp. nov., but can be distinguished from the latter by the following characters (based on male): (1) lateral margins of elytra reaching sutural angle (not reaching in B. latitarsis ); (2) distal part of parameres straight in lateral view (parameres “S” curved in B. latitarsis ).

Etymology. This species name is derived from its similarity to B. latitarsis .

Figures

FIGURES 9–10. Characters. 9. Bioramix homoplasta (male), 10. B. impressithorax (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 74–97. Parameres of male aedeagus in dorsal and lateral view. 74–75. Bioramix homoplasta; 76–77. B. hongyuanensis; 78–79. B. igori; 80–81. B. impressithorax; 82–83. B. integra; 84–85. B. kochi; 86–87. B. latitarsis; 88–89. B. laxipenis; 90–91. B. lhozhagensis; 92–93. B. longipilis; 94–95. B. micans; 96–97. B. miranda.

FIGURES 232–237. Habitus. 232–233. Bioramix frivaldszkyi (males; 232. syntype); 234–235. B. homoplasta (234. male, holotype; 235. female, paratype); 236–237. B. hongyuanensis (males; 236. holotype).