Bioramix (Leipopleura) longipilis, 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 : 37-38

Bioramix (Leipopleura) longipilis sp. nov.

( Figs 14 , 92–93 , 252–253 )

Description. Body black-brown, weakly shining, antennae, palpi and tarsi brown.

Male ( Figs 14 , 92–93 , 252 ). Head. Anterior margin of epistome weakly protruding forward, 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. Eyes transverse, anterior margin shallowly emarginate. Antennae ( Fig. 14 : 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 20 (15): 31 (16): 21 (15): 19 (14): 24 (16): 23 (17): 23 (21): 22 (22): 19 (22): 30 (21).

Prothorax. Pronotum ( Fig. 14 : B) transverse and convex, 1.5 times as wide as long and 1.9 times as wide as head. Lateral sides widest anterior to middle, nearly parallel to base and arcuately narrowing toward apex. Ratio of width at anterior margin to widest part and base 24: 36: 32. Anterior margin slightly emarginate or straight, posterior one nearly straight. Anterior and posterior angles obtuse. Anterior and posterior margins edged laterally, entire lateral margins edged. Dorsal surface with extremely sparse and fine punctures on disc, denser 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 wrinkled, with indistinct sparse, fine punctures, erected and long setae along lateral margins, intervals between punctures convex. Lateral margins of elytra merging with outer margins of epipleura anterior to apex of elytra and reaching sutural angle, 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. 14 : 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. 14 : C) narrower than apex of protibiae. Meso- and metafemora longer than profemora. Mesotibiae ( Fig. 14 : E) gradually widened toward apex, with rufous thick setae, inner side with dense yellow hairbrush from middle to apex. Mesotarsi ( Fig. 14 : F) narrower than apex of mesotibiae. Metatibiae ( Fig. 14 : G) straight, with rufous thick setae, inner side with dense yellow hairbrush from middle to apex. Length (width) ratio of pro-, meso- and metafemora 18 (7): 21 (6): 22 (7), that of corresponding tibiae 16 (7): 17 (5): 24 (6), and protarsi 26 (19): 27 (39): 19 (40): 16 (28): 38 (16), mesotarsi 17 (20): 25 (31): 22 (27): 16 (17): 46 (17), metatarsi ( Fig. 14 : H) 52 (19): 33 (18): 25 (16): 53 (17).

Aedeagus ( Figs 14 : I–J, 92–93) 2.4 mm long and 0.7 mm wide. Parameres 0.9 mm long and 0.5 mm wide, widest at base and narrowing toward apex, lateral sides weakly emarginate posterior to apex, sharped apically in dorsal view, distal part weakly curved dorsally in lateral view.

Female ( Fig. 253 ). Body wider, antennae not reaching pronotal base, abdominal ventrites 1–2 not flattened at middle, pro- and mesotarsi not widened, other characters similar to male.

Measurements. Body length: ♂ 8.0– 8.2 mm, ♀ 7.9–8.4 mm and width: ♂ 4.3–4.4 mm, ♀ 4.2–4.5 mm.

Type material. Holotype: ♂ ( MHBU), CHINA : Xizang: Beila Town , Bangoin County, 27.VII.2004, Ai-Min Shi & Yi-Bin Ba leg. Paratypes: 2♂♂, 6♀♀ ( MHBU), same data as holotype ; 1♂ ( MHBU), Provincial Road S301, Pung Co , Qangma Town , Amdo County, 31°29.584′ N, 91°03.593′ E, 4592 m, 18.VIII.2018, Xing-Long Bai, Zi- Yuan Hu & Ming-Min Ma leg.

Distribution. China: Xizang.

Diagnosis. This new species is similar to Bioramix (Leipopleura) rufipalpis ( Reitter, 1887) , but can be distinguished from the latter by the following characters (based on male): (1) pronotal punctures sparser (denser in B. rufipalpis ); (2) elytral punctures indistinct, with longer setae along lateral margins, lateral margins reaching sutural angle (clearly, shorter, not reaching in B. rufipalpis ); (3) apical margin of protibiae more weakly extended outward, metatibiae straight (more strongly, curved in B. rufipalpis ); (4) parameres sharped apically in dorsal view, distal part weakly curved dorsally in lateral view (more wide and straight, strongly in B. rufipalpis ).

Etymology. This species name is derived from its long setae along lateral margins of elytra.

Figures

FIGURES 13–14. Characters. 13. Bioramix lhozhagensis (male), 14. B. longipilis (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 250–255. Habitus. 250. Bioramix laxipenis (female, paratype); 251. B. lhozhagensis (male, holotype); 252–253. B. longipilis (252. male, holotype; 253. female, paratype); 254–255. B. micans (males; 254. lectotype).