Bioramix (Leipopleura) latitarsis, 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 : 32-34

Bioramix (Leipopleura) latitarsis sp. nov.

( Figs 11 , 86–87 , 247–248 )

Description. Body black, weakly shining.

Male ( Figs 11 , 86–87 , 247 ). Head. Anterior margin of epistome nearly 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. 11 : A) not reaching pronotal base, antennomeres II–VIII short cylindrical and thicker at apex, IX–X spherical, XI sharped-oval. Length (width) ratio of antennomeres II–XI 16 (16): 34 (19): 23 (17): 24 (18): 24 (18): 23 (19): 26 (22): 21 (21): 21 (22): 18 (21).

Prothorax. Pronotum ( Fig. 11 : B) transverse and convex, 1.6 times as wide as long and 2.2 times as wide as head. Lateral sides widest at base, parallel to middle and arcuately narrowing toward apex. Ratio of width at anterior margin to widest part and base 22: 37: 17. Anterior margin emarginate, posterior one nearly straight. Anterior angles weakly obtuse, posterior angles rectangular, rounded apically. Anterior and posterior margins edged laterally, entire lateral margins edged. Dorsal surface with sparse and fine punctures on disc, dense and coarse 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, 1.3 times as long as wide and 1.1 times as wide as pronotum, base slightly wider than pronotum and widest at middle. Surface with moderately dense and coarse punctures, dense wrinkles. Lateral margins of elytra not reaching sutural angle, interrupted at middle, visible at middle in dorsal view.

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

Legs. Profemora stout, with sparse punctures and yellow setae. Protibiae ( Fig. 11 : D) gradually widened toward apex, underside concave at apex, apical margin weakly foliate extended, inner side with dense yellow hairbrush from middle to apex. Protarsi ( Fig. 11 : C) narrower than apex of protibiae. Meso- and metafemora longer than profemora. Mesotibiae ( Fig. 11 : E) gradually widened toward apex, with yellow setae and rufous thick setae. Mesotarsi ( Fig. 11 : F) almost as wide as protarsi, narrower than apex of mesotibiae. Metatibiae ( Fig. 11 : G) nearly straight, with yellow setae and rufous thick setae. Length (width) ratio of pro-, meso- and metafemora 14 (7): 14 (5): 22 (6), that of corresponding tibiae 14 (7): 15 (4): 23 (4), and protarsi 18 (23): 33 (48): 22 (46): 12 (30): 43 (16), mesotarsi 25 (27): 28 (43): 23 (37): 10 (24): 50 (17), metatarsi ( Fig. 11 : H) 73 (22): 46 (25): 37 (23): 48 (19).

Aedeagus ( Figs 11 : I–J, 86–87) 2.6 mm long and 0.7 mm wide. Parameres 1.0 mm long and 0.7 mm wide, widest at base and straightly narrowing toward apex, distal part weakly curved dorsally in lateral view.

Female ( Fig. 248 ). 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: ♂ 8.1–9.1 mm, ♀ 7.8–8.4 mm and width: ♂ 4.1–4.3 mm, ♀ 4.1–4.3 mm.

Type material. Holotype: ♂ ( MHBU), CHINA : Qinghai: Gyêgu Town , Yushu County, 4200 m, 3.VII.2008, Guo-Dong Ren et al. leg . Paratypes: 13♂♂, 8♀♀ ( MHBU), same data as holotype ; 2♀♀ ( MHBU), Yushu Coun- ty, 4350 m, 4.VII.2008, Guo-Dong Ren et al. leg .; 2♂♂, 1♀ ( MHBU), Wenchenggongzhu [Princess Wencheng] Temple, Yushu Zhou [equivalent to City], 32°53.214′ N, 97°03.400′ E, 3806 m, 25.VII.2019, Guo-Dong Ren, Xing- Long Bai, Ya-Lin Li, Ming-Min Ma & He Shi leg. ; 1♂, 5♀♀ ( MHBU), Qurisai Shan, Batang Township, Yushu Zhou , 32°53.516′ N, 96°44.014′ E, 4287 m, 12.VIII.2019, Xing-Long Bai, Ya-Lin Li, Ming-Min Ma & He Shi leg. ; 1♀ ( MHBU), Zhidoi County, 3.VII.2008, Guo-Dong Ren et al. leg .

Distribution. China: Qinghai.

Diagnosis. This new species is similar to Bioramix (Leipopleura) homoplasta sp. nov. (see diagnosis of B. homoplasta ) and Bioramix (Leipopleura) reinigi ( Kaszab, 1940) , but can be distinguished from the latter by the following characters (based on male): (1) body black (brown, at least antennae, palpi and legs brown in B. reinigi ); (2) elytral surface with moderately dense and coarse punctures, dense wrinkles (sparse and fine, shallow in B. reinigi ); (3) protarsi and mesotarsi strongly widened (more weakly in B. reinigi ).

Etymology. This species name is derived from its strongly widened protarsi and mesotarsi.

Figures

FIGURES 11–12. Characters. 11. Bioramix latitarsis (male), 12. B. laxipenis (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 244–249. Habitus. 244. Platyscelis obovatus (= Bioramix integra, female, holotype); 245–246. Bioramix kochi (males; 245. lectotype); 247–248. B. latitarsis (247. male, holotype; 248. female, paratype); 249. B. laxipenis (male, holotype).