Gnaptorina (Gnaptorina) crenata, 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 : 170-172

Gnaptorina (Gnaptorina) crenata sp. n.

( Figs 4 , 11–12 )

Type material. Holotype: ♂ ( MHBU) ( Fig. 11 ), labeled “ 2016-VIII-6 / nṃHṮƃṙơ̈ [ Jinsha Township , Baiyü County, Sichuan] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛṽḓḣú [Museum of Hebei University]” // “ 31°16.522′ N / 98°48.017′ E / Alt. 2980 / āẛƛṽḓḣú [Museum of Hebei University]” . Paratypes: 6♂ 1♀ ( MHBU), same data as holotype ; 5♂ 5♀ [1♂ 2♀ in ethanol] ( MHBU), labeled “ 2016-VIII-6 / nṃHṮƃāå̛ [ Hepo Township , Baiyü County, Sichuan] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛ

ṽḓḣú [Museum of Hebei University]” // “ 31°22.899′ N / 98°53.359′ E / Alt. 3000 / āẛƛṽḓḣú [Museum of Hebei University]”; 1♂ 1♀ ( MHBU), labeled “ 2004-VI-5 / nṃẽh [Dêgê County, Sichuan] / Bẍẇ aḛ K [Yi-Bin Ba & Ai-Min Shi leg.] / āẛƛṽḓḣú [Museum of Hebei University]” ; 5♂ 4♀ ( MHBU), labeled “ 2011-VII-26 / nṃuōẽhḙä [ Jangra Township , Dêgê County, Garzê Zhou [similar to City], Sichuan] / "Dz ̏̐ [Guo-Dong Ren et al. leg.] / āẛƛṽḓḣú [Museum of Hebei University]” ; 6♀ [4♀ in ethanol] ( MHBU), labeled “ 2016-VIII-6 / nṃẽhƃḙä̛ [ Jangra Township , Dêgê County, Sichuan] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛṽḓḣú [Museum of Hebei University]” // “ 31°41.912′ N / 98°34.786′ E / Alt. 3120 / āẛƛṽḓḣú [Museum of Hebei University]” ; 17♂ 5♀ [1♂ 2♀ in ethanol] ( MHBU), labeled “ 2016-VIII-6 / nṃẽhƃHä̛ [ Baiya Township , Dêgê County, Sichuan] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛṽḓḣú [Museum of Hebei University]” // “ 31°30.425′ N / 98°43.635′ E / Alt. 3021 / āẛƛṽḓḣú [Museum of Hebei University]” ; 2♂ 2♀ ( MHBU), labeled “ 2016-VIII-5 / nṃuōƃ̊żñm [Mt. Zhuoda-La- Shan , Garzê County, Sichuan] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛṽḓḣú [Museum of Hebei University]” // “ 31°24.243′ N / 99°57.962′ E / Alt. 4800 / āẛƛṽḓḣú [Museum of Hebei University]”; 2 exs [in ethanol] ( MHBU), labeled “ 2016-VIII-7 / ƋÎãż ƃÑ̈ḋ [ Gamtog Town , Jomda County , Xizang] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛṽḓḣú [Museum of Hebei University]” // “ 31°34.763′ N / 98°34.434′ E / Alt. 3223 / āẛƛṽḓḣú [Museum of Hebei University]” ; 1♂ 2♀ ( MHBU), labeled “ 2016-VIII- 8 / ƋÎãżƃƚư̄ [ Kargang Township , Jomda County, Xizang] / Īṯü H̎̋ Ĵĸ¨ DZİē [Xiu-Min Li, Xing-Long Bai, Run-Yang Zhang & Xian-Lei Shao leg.] / āẛƛṽḓḣú [Museum of Hebei University]” // “ 31°26.669′ N / 98°09.032′ E / Alt. 3700 / āẛƛṽḓḣú [Museum of Hebei University]”. Types have the additional label “ HOLOTYPE (and PARATYPE, respectively) / Gnaptorina crenata sp. n. / Det. Bai Xinglong, 2018” .

Description. Body black, weakly shiny; antennae, palpi and tarsi brown.

Male ( Figs 4 A–J, 11). Head ( Fig. 4A ).Anterior margin of epistome nearly straight. Lateral margins of head with shallow obtuse-angled incision above antennal base. Genal margins converging before eyes. Eyes transverse, not protruding beyond contour of head. Dorsal surface of head weakly convex, with dense and fine punctures. Antennae ( Fig. 4B ) reaching pronotal base; antennomeres 4–7 long and cylindrical, 8–10 spherical, 11 oval; length (width) ratio of antennomeres 2–11 32(25): 58(24): 33(25): 33(23): 32(22): 36(23): 34(28): 33(32): 35(32): 48(33).

Prothorax. Pronotum ( Fig. 4C ) transverse, 1.3 times as wide as long, 1.8 times as wide as head. Lateral sides widest at base (sometimes at middle), ratio of width at anterior margin to base 25: 43. Anterior margin straight, laterally beaded; lateral margins subparallel from base to middle and narrowing toward anterior angles arcuately, sometimes weakly emarginate before posterior angles, finely beaded along entire length; posterior margin straight, not beaded. Anterior angles obtuse, posterior ones rectangular. Disc convex, surface with dense and fine punctures, sparser at disc. Prothoracic hypomera weakly concave, smooth, with longitudinal wrinkles and sparse and tiny granules. Prosternal process steeply sloping behind procoxae and forming wide and flat prominence at end of declivity.

Pterothorax. Elytra widely oval and weakly convex, 1.3 times as long as wide, 1.3 times as wide as pronotum, widest before middle. Surface with shallow fine and sparse punctures and irregular short wrinkles. Lateral margins reaching sutural elytral angle, visible dorsally in anterior half and apex. Surface of epipleura smooth, with shallow wrinkles and sparse and tiny granules.

Abdomen. Ventrites almost without setae, 1–3 with longitudinal wrinkles, apex of 3 and 4–5 with punctures.

Legs ( Fig. 4 D–H) strong. Profemora with obtuse tooth. Protibiae nearly straight, upper apical spur nearly as long as protarsomere 1, lower apical spur extremely short; ventral surface of protarsomeres 1–3 with hairy brush, 4 with hairy tuft at apex laterally. Mesotibiae weakly curved; ventral surface of mesotarsomeres 1 and 2 with hairy brush. Metatibiae straight. Ratio of length (width) of pro-, meso- and metatibiae 28(4): 30(5): 38(6), that of metatarsomeres 1–4 9(3): 5(3): 5(3): 10(3).

Aedeagus ( Fig. 4 I–J) 2.0 mm long and 0.6 mm wide. Parameres 0.8 mm long and 0.4 mm wide, widest at base and straightly narrowing from basal 1/5 to apex laterally in dorsal view; dorsal side nearly straight, slightly curved to ventral side apically in lateral view.

Female ( Fig. 12 ). Body wider than male. Antennae not reaching pronotal base, antennomeres 4–7 short and cylindrical. Protibiae curved, upper apical spur wide and flat, longer than protarsomeres 1 and 2 combined. Ventral surface of pro- and mesotarsi without hairy brush or tuft. Inner apical spur of metatibiae strongly widened at apex.

Measurements. Body length: ♂ 11.1–11.9 mm, ♀ 11.1–12.2 mm; width: ♂ 5.6–6.4 mm, ♀ 6.3–6.6 mm.

Etymology. This species is named from the Latin adjective “ crenatus, -a, -um ” (= notched), in reference to the obtuse tooth of profemora.

Distribution. China: Sichuan, Xizang.

Diagnosis. This new species is morphologically similar to G. platytarsia Li & Ren, 2004 , but can be distinguished from the latter by the following male character states: (1) anterior margin of pronotum straight (emarginate in G. platytarsia ); (2) elytra much wider; (3) profemora with obtuse tooth (slightly emarginate in G. platytarsia ); (4) protarsomeres 1–3 not widened, nearly as wide as 4 (widened, much wider than 4 in G. platytarsia ); (5) parameres narrow and long (wide and short in G. platytarsia , Fig. 39 in Li & Ren, 2004).

Figures

FIGURE 4. Characters. Gnaptorina (Gnaptorina) crenata sp. n. (male). A. head; B. antenna; C. pronotum; D. apex of profemur; E. protibia; F. protarsus; G. mesotarsus; H. metatibia; I–J. aedeagus in dorsal and lateral view. Scale bars: 0.5 mm.

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).