Itagonia xinlongensis, Shi, Ai-Min, Yuan, Shi-Bin & Wu, Chun-Lian, 2010

Shi, Ai-Min, Yuan, Shi-Bin & Wu, Chun-Lian, 2010, Three new species of Itagonia Reitter, 1887 (Coleoptera, Tenebrionidae: Blaptini) from Sichuan, China, Zootaxa 2573, pp. 57-68 : 61-62

Itagonia xinlongensis , sp. nov.

( Figs. 24–36 , 59–60 )

Type material. Holotype: ɗ, CHINA: Sichuan, Xinlong, 30º56' N, 100º19' E, 3100 m, 9 Aug. 2009, collected by Ai-min Shi and Chun-lian Wu ( MCWNU). Paratypes: 1 Ψ, same data as the holotype ( MCWNU).

Diagnosis. The new species resembles Itagonia elegans Medvedev , with the following differences: anterior margin of clypeus straight. Pronotum 1.35 times as wide as long. Anterior margin of pronotum weakly sinuate. Lateral margins of pronotum not reflexed. Ventral surface of protarsomeres 1and 2 with hair brushes.

Etymology. Named after the type locality, Xinlong.

Description. Body black dorsally and somewhat pitchy brown ventrally, indistinctly shining; antennae, palpi and legs somewhat pitchy brown.

Male ( Figs 24, 26–33 ). Anterior margin of clypeus straight. Lateral margin of head with obtuse-angled shallow incision above antennal base. Outer margins of genae parallel-sided before eyes. Vertex with uniform punctures. Frontoclypeal suture distinct. Antennae ( Fig. 24 ) long, when posteriorly extended, reaching pronotal base. Length (width) ratio of antennomeres 2 to 11 as follows: 13 (10): 34(11): 16(11): 16(11): 16(11): 18(11): 17(15): 15(16): 15(16): 20(16).

Pronotum ( Fig. 26 ) transverse, 1.35 times as wide as long, widest in the middle, 1.88 times as wide as head. Ratio of pronotal width at anterior margin to its maximum width and width at base 0.79: 1.00: 0.90. Lateral margins of pronotum arcuately converging to anterior margin in anterior 1/2, slightly sinuate in basal 1/4, finely bordered along entire length. Anterior margin of pronotum weakly sinuate, base straight, both bordered laterally. Anterior angles of pronotum obtuse, posterior ones rectangular, both rounded apically. Pronotal surface between lateral margins convex, with uniform punctures fine at disc center and larger laterally, median depression short and obscure. Propleura with longitudinal wrinkles and sparse granules. Prosternum in front of procoxae oblique; intercoxal process of prosternum with median depression, steeply sloping behind procoxae.

Elytra elongate-oval, 1.41 times as long as wide, widest before the middle, 1.85 times as wide as pronotum. Outer margin of epipleura visible from above along entire length. Elytral surface between outer margin of epipleura and sutural margin slightly convex, with fine punctures and irregular wrinkles. Epipleura surface with sparse fine wrinkles and very sparse granules. Visible abdominal sternites with punctures and brown setae, 1 to 3 visible abdominal sternites with irregular wrinkles.

Legs moderately robust, length (width) ratio of pro-, meso- and metafemora 81(25): 89(20): 100(22); that of corresponding tibiae: 71(11): 70(13): 96(15). Upper edge of inner surface of profemur forming obtuseangled prominence with rounded apex ( Fig. 27 ). Protibiae with massive upper spur at apical margin, lower spur fine and pointed. Ventral surface of protarsomeres 1and 2 with hair brushes, that of mesotarsomere 1 with small hair brush. Mesofemur and mesotibiae as in Fig. 28 . Metatibiae weakly incurved. Length (width) ratio of metatarsomeres 1 to 4 as follows: 25(7.2): 13(7.0): 13(6.5): 23(6.3).

Aedeagus ( Figs 29–31 ): length 2.25 mm, width 0.67 mm. Parameres 0.72 mm long and 0.42 mm wide, with outer margins sinuate in basal 1/3, and apical part regularly narrowing towards apex. Spiculum gastrale as in Fig. 32 . Apical margin of abdominal inner sternite 8 sinuate ( Fig. 33 ).

Female ( Figs 25, 34–36 ). Body wider. Antennae ( Fig. 25 ) shorter than in male, when posteriorly extended, not reaching pronotal base. Outer margin of epipleura in dorsal view concealed by outer convexity of elytra before apex. Upper spur of protibiae much larger than lower spur, but not very massive. Ventral surface of pro- and mesotarsomeres without hair brushes or apical tuft of pale hairs. Ovipositor as in Figs 34– 35 . Spiculum ventrale as in Fig. 36 .

Measurements. Male body length 11.4 mm, width 5.4 mm; female body length 11.5 mm, width 5.9 mm. Distribution. China: Sichuan (Xinlong).

Figures

FIGURES 24 – 36. Itagonia xinlongensis, sp. nov. 24. antenna of male; 25. antenna of female; 26. pronotum of male; 27. profemur and protibiae of male; 28. mesofemur and mesotibiae of male; 29 – 30. apical part of aedeagus in dorsal and ventral views; 31. aedeagus in lateral view; 32. spiculum gastrale; 33. abdominal inner sternite 8 of male; 34 – 35. ovipositor in dorsal and ventral views; 36. spiculum ventrale.

FIGURES 57 – 60. 57 – 58. Itagonia tuberculata, sp. nov.: 57. male, length 10.6 mm; 58. female, length 11.5 mm; 59 – 60. I. xinlongensis, sp. nov.: 59. male, length 11.4 mm; 60. female, length 11.5 mm.