Bioramix (Leipopleura) subcarinata, 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 : 53-55

Bioramix (Leipopleura) subcarinata sp. nov.

( Figs 21 , 182–183 , 313–314 )

Description. Body brown, weakly shining, antennae, palpi and legs red-brown, elytral surface with weakly metallic sheen.

Male ( Figs 21 , 182–183 , 313 ). 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 flattened, with dense and coarse punctures. Anterior margin of gena protruding outward anterior to eyes, distance between genae almost as long as that of eyes. Eyes transverse, anterior margin shallowly emarginate. Antennae ( Fig. 21 : 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 25 (17): 47 (20): 28 (20): 27 (18): 26 (18): 29 (19): 29 (24): 25 (25): 26 (25): 28 (22).

Prothorax. Pronotum ( Fig. 21 : B) transverse and convex, 1.4 times as wide as long and 1.7 times as wide as head. Lateral sides widest nearly at middle, nearly straight or arcuately narrowing toward base and apex. Ratio of width at anterior margin to widest part and base 19: 30: 29. Anterior margin weakly emarginate or nearly straight, posterior one weakly 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 narrowly depressed from base to 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, 1.2 times as long as wide and 1.2 times as wide as pronotum, base wider than pronotum and widest at middle. Surface with sparse, fine punctures and wrinkles, traces of longitudinal carinae. Lateral margins of elytra not reaching sutural angle, interrupted at middle, visible at base in dorsal view.

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

Legs. Profemora stout, with sparse punctures and yellow setae. Protibiae ( Fig. 21 : 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. 21 : C) narrower than apex of protibiae. Meso- and metafemora longer than profemora. Mesotibiae ( Fig. 21 : E) gradually widened toward apex, with rufous thick setae, inner side with dense yellow hairbrush from middle to apex. Mesotarsi ( Fig. 21 : F) narrower than apex of mesotibiae. Metatibiae ( Fig. 21 : 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 20 (6): 22 (6): 28 (7), that of corresponding tibiae 20 (7): 20 (6): 30 (7), and protarsi 20 (21): 38 (51): 28 (51): 21 (37): 57 (18), mesotarsi 18 (27): 37 (43): 32 (40): 22 (27): 60 (19), metatarsi ( Fig. 21 : H) 66 (24): 43 (23): 33 (22): 65 (20).

Aedeagus ( Figs 21 : I–J, 182–183) 2.4 mm long and 0.7 mm wide. Parameres 0.8 mm long and 0.6 mm wide, widest at base and narrowing toward apex, distal part strongly curved dorsally in lateral view.

Female ( Fig. 314 ). Body wider, abdominal ventrites 1–2 not flattened at middle, pro- and mesotarsi not widened, other characters similar to male.

Measurements. Body length: ♂ 8.1–10.1 mm, ♀ 7.8–9.6 mm and width: ♂ 4.4–5.5 mm, ♀ 4.6–5.5 mm.

Type material. Holotype: ♂ ( MHBU), CHINA : Xizang: Qulho Township , Coqên County, 30°08.116′ N, 85°41.630′ E, 5351 m, 21.VIII.2015, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. Paratypes: 15♂♂, 9♀♀ ( MHBU), same data as holotype ; 2♂♂, 2♀♀ ( MHBU), Gyangrang Township , Coqên County, 30°23.071′ N, 85°37.860′ E, 4850 m, 21.VIII.2015, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. ; 8♂♂, 3♀♀ ( MHBU), Daxung Township , Coqên County, 31°37.756′ N, 85°10.225′ E, 5134 m, 22.VIII.2015, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. ; 2♂♂, 2♀♀ ( ZIN), Coqên County, 30°51′ N, 85°09′ E, 4615 m, 18.VII.2012, Ai-Min Shi & Yi-Bin Ba ; 3♂♂, 3♀♀ ( MCWNU) , 2♂♂, 2♀♀ ( MRCSPU), Coqên County, 30°51′ N, 85°09′ E, 4615 m, 18.VII.2004, Yun-Chun Li & Yong-Ping Lai leg. ; 8♂♂, 15♀♀ ( MHBU), Eluo , Xainza County, 30.5580° N, 88.9305° E, 4850 m, 3.VIII.2009, Guo-Dong Ren et al. leg .; 36♂♂, 31♀♀ ( MHBU), Tüna Township, Yadong County, Xigazê City , 28°02.990′ N, 89°10.164′ E, 4506 m, 1.VIII.2011, Guo-Dong Ren et al. leg .; 28♂♂, 29♀♀ ( MHBU), Tüna Township , Yadong County, 28°03.518′ N, 89°16.215′ E, 4510 m, 19.VIII.2015, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. ; 14♂♂, 10♀♀ ( MHBU), Tüna Township , Yadong County, 27°52.440′ N, 89°11.471′ E, 4519 m, 19.VIII.2015, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. ; 1♂, 3♀♀ ( MHBU), Pagri Town , Yadong County, 27°48.237′ N, 89°08.766′ E, 4413 m, 18.VIII.2015, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. ; 11♂♂, 6♀♀ ( MHBU), N Pagri Town , Yadong County, 27°47.778′ N, 89°08.803′ E, 4359 m, 11.VI.2018, Xing- Long Bai leg. ; 118♂♂, 76♀♀ ( MHBU), Zhahujue Shan , Yadong County, 27°51′30.9′′ N, 88°57′46.8′′ E, 4591 m, 20.VIII.2019, Zhao Pan, Xiu-Min Li, Ming Wen & Lan-Rui Wang leg. ; 2♂♂ ( MHBU), Riazhi , Bangoin County, 31°15.619′ N, 90°21.162′ E, 4657 m, 11.VIII.2011, Guo-Dong Ren et al. leg .; 16♂♂, 10♀♀ ( MHBU), Lamucuo Shan, Maintang Township , Bangoin County, 31°28.876′ N, 89°51.916′ E, 4772 m, 17.VIII.2018, Xing-Long Bai, Zi- Yuan Hu & Ming-Min Ma leg. ; 1♂, 1♀ ( MHBU), Moxiu, Pubu Town , Bangoin County, 31°27.316′ N, 89°59.023′ E, 4872 m, 17.VIII.2018, Xing-Long Bai, Zi-Yuan Hu & Ming-Min Ma leg. ; 8♂♂, 3♀♀ ( MHBU), Songduoke, Chigu Town , Comai County, 28°35.158′ N, 91°30.319′ E, 4727 m, 8.VIII.2014, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. ; 35♂♂, 38♀♀ ( MHBU), Bowu, Songduoke , Comai County, 28°34′23′′ N, 91°29′55.45′′ E, 4973 m, 31.VII.2019, Zhao Pan, Xiu-Min Li, Ming Wen & Lan-Rui Wang leg. ; 3♂♂, 3♀♀ ( ZIN), Comai County, 28º34.946′ N, 91º30.397′ E, 4834 m, 8.VIII.2014, Yun-Chun Li leg. ; 6♂♂, 1♀ ( MHBU), Daggyai Co , Ngamring County, 29°45.595′ N, 85°44.574′ E, 5230 m, 21.VIII.2015, Guo-Dong Ren, Xing-Long Bai & Jun-Sheng Shan leg. ; 4♂♂, 3♀♀ ( MHBU), Xuege La Shan , Damxung County, 29°55′26.4′′ N, 90°08′19.4′′ E, 5147 m, 9.VIII.2019, Zhao Pan, Xiu-Min Li, Ming Wen & Lan-Rui Wang leg.

Distribution. China: Xizang.

Diagnosis. This new species is similar to Bioramix (Leipopleura) rugelytra sp. nov., but can be distinguished from the latter by the following characters (based on male): (1) pronotum widest nearly at middle, surface with fine punctures on disc, denser and coarser at sides (at base, coarse on disc, dense at sides in B. rugelytra ); (2) elytra with traces of longitudinal carinae (without in B. rugelytra ); (3) metatibiae weakly curved (straight in B. rugelytra ); (4) distal part of parameres strongly curved dorsally in lateral view (more weakly in B. rugelytra ).

Etymology. This species name is derived from its traces of longitudinal carinae on elytra.

Figures

FIGURES 21–22. Characters. 21. Bioramix subcarinata (male), 22. B. tiani (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 170–189. Parameres of male aedeagus in dorsal and lateral view. 170–171. Bioramix riwoqeica; 172–173. B. rubripes; 174–175. B. rufipalpis; 176–177. B. darbukensis (= B. rufipalpis); 178–179. B. rugelytra; 180–181. B. seidlitzi; 182– 183. B. subcarinata; 184–185. B. tiani; 186–187. B. yushuana; 188–189. B. pamirensis.

FIGURES 310–315. Habitus. 310. Bioramix rugelytra (female, paratype); 311–312. B. seidlitzi (311. male, holotype; 312. female, paratype); 313–314. B. subcarinata (313. male, holotype; 314. female, paratype); 315. B. tiani (male, holotype).