Gnaptorina (Austroptorina), Bai & Li & Ren, 2020

Bai, Xing-Long, Li, Xiu-Min & Ren, Guo-Dong, 2020, Description of a new subgenus and four new species of Gnaptorina Reitter, 1887 (Coleoptera: Tenebrionidae: Blaptini) from China, Zootaxa 4809 (1), pp. 165-176 : 166-167

Austroptorina subgen. n.

Type species. Gnaptorina longicornis Li & Ren, 2004 .

Description. Body elongate, black. Head transverse, dorsal surface with dense and fine punctures. Eyes transverse. Antennae slender and long, antennomeres 4–7 long and cylindrical, 8–10 or 9–10 spherical, 11 oval; antennae reaching beyond pronotal base in males, not reaching pronotal base in females. Pronotum widest at base or in middle, disc convex with dense and fine punctures, larger on sides. Prothoracic hypomera weakly concave, with longitudinal wrinkles and sparse and tiny granules. Prosternal process steeply sloping behind procoxae and forming wide and flat prominence at end of declivity. Elytra elongate, surface convex, smooth or coarse. Lateral margins reaching sutural elytral angle, visible dorsally in anterior third and apex. Surface of epipleura smooth, with shallow wrinkles. Abdominal ventrites with sparse and short yellow setae, 1 and 2 flat or concave in middle in male. Legs slender and long, profemora with weakly obtuse tooth. Male protibiae slightly emarginate from middle to apex on inner side and weakly curved to inner side apically. Inner side of protibiae straight, not curved to inner side apically in female. Ventral surface of protarsomeres 1–2 and mesotarsomere 1 with hairy brush in males. Metatibiae straight or curved. Upper apical spur of protibiae wide and flat, inner apical spur of metatibiae strongly widened at apex in females. Male parameres widest at base and narrowing toward apex arcuately in dorsal view, slightly curved to ventral side apically in lateral view.

Etymology. This subgenus is named from the Latin adjective “ australis ” (= southern) and “ ptorina ” indicates the generic name, referring to the southern distribution of this subgenus.

Distribution. China: southeastern Xizang and western Hengduan Mountains.

Diagnosis. Ventral surface of male mesotarsomeres with hairy brush in the subgenera Austroptorina subgen. n. and Gnaptorina whereas it is absent in the subgenera Boreoptorina and Hesperoptorina . In addition, the male protibiae are slightly emarginate from middle to apex on inner side and weakly curved to inner side apically in the new subgenus, whereas they are neither emarginate on inner side nor curved to inner side apically in the subgenus Gnaptorina .

Species included. G. longicornis Li & Ren, 2004 ; G. polita sp. n.

Remarks. The generic status of the species G. longicornis ( Figs 1 , 6 ) was discussed by Medvedev (2009), who excluded this species from his list of known Gnaptorina species. In the molecular study of the genus Gnaptorina , we found that G. polita sp. n. and G. longicornis unequivocally belong to the genus Gnaptorina based on the results of molecular phylogenetic analyses (see our separated study on phylogenetics and systematics of Gnaptorina ).

Figures

FIGURE 1. Gnaptorina (Austroptorina) longicornis Li & Ren, 2004. A. habitus (male, holotype); B. type labels; C–D. aedeagus in dorsal and lateral view.

FIGURES 6–14. Habitus. 6. Gnaptorina longicornis (male); 7–8. G. polita (7. male, holotype; 8. female, paratype); 9–10. G. artipenis (9. male, holotype; 10. female, paratype); 11–12. G. crenata (11. male, holotype; 12. female, paratype); 13–14. G. ampliptera (13. male, holotype; 14. female, paratype).