Sinosphaera aptera Konstantinov & Ruan

Ruan, Yongying, Konstantinov, Alexander S., Prathapan, K. D. & Yang, Xingke, 2017, Contributions to the knowledge of Chinese flea beetle fauna (II): Baoshanaltica new genus and Sinosphaera new genus (Coleoptera, Chrysomelidae, Galerucinae, Alticini), ZooKeys 720, pp. 103-120 : 110-115

Sinosphaera aptera Konstantinov & Ruan sp. n. Figs 4, 5, 6

Etymology.

This species is named after the absence of hindwings.

Distribution.

China.

Host plant.

Unknown.

Type material.

Holotype, ♂ (IZCAS), labels: 1) CH, Sichuan, right bank of r. trib. of Lanhegou River, SSW of Jimi Vill., 2200-2600 m, 25.VI.2000, Belousov, Kabak, Davidian. 2) Holotype. 3) Sinosphaera aptera des. Konstantinov & Ruan, 2016.

Paratypes.

5♂ (USNM), labels: 1) CH, Sichuan, right bank of r. trib. of Lanhegou River, SSW of Jimi Vill., 2200-2600 m, 25.VI.2000, Belousov, Kabak, Davidian. 2) Paratype Sinosphaera aptera des. Konstantinov & Ruan, 2016.

Description.

Dorsal surface glabrous, metallic bluish or greenish, pronotum slightly darker than elytra. Body spherical in dorsal view, moderately and evenly convex in lateral view. Body length: 2.60-2.80 mm (n=2). Body width (widest point of elytra): 1.80-2.00 mm. Body length to width, ratio 1.35-1.45. Pronotum width to length, ratio 1.90-2.00. Pronotum width at base to width at apex, ratio 1.25-1.35. Elytron length (measured along suture) to width of both, ratio 0.95-1.05. Length of elytron to length of pronotum, ratio 2.60-2.70. Width of elytra at base (measured across middle of humeral calli) to width of pronotum at base, ratio 1.05-1.10.

Vertex shiny, with extremely minute and distantly placed punctures bearing small setae, punctures larger at base of vertex. Anterofrontal ridge with wrinkles on surface facing antennal calli.

Antennae with antennomeres of following proportions: 20:10:8:10:9:9:10:11:10: 10:15.

Distal antennomeres slightly wider than middle ones. Length to width of antennomere 9, ratio 1.40-1.45. Length to width of antennomere 10, ratio 1.15-1.20. Length to width of antennomere 11, ratio 2.40-2.45.

Pronotal surface glabrous with small, evenly spaced punctures, smaller than elytral punctures. Sides of pronotum weakly convex, strongly converging anteriorly. Pronotal base evenly convex.

Humeral calli of elytra absent. Hind wings absent. Elytral punctures larger than pronotal, confused.

Length (not counting trochanter) to maximum width of metafemur, ratio 2.50-2.55. Metatibia slender, its length to width in lateral view, ratio 7.00-7.10. Length of metatibia to length of first metatarsomere, ratio 4.65-4.70. First protarsomere of male, length to width, ratio (in dorsal view), 1.20-1.30. Length of first protarsomere to length of second protarsomere, ratio 1.70-1.75. Width of first protarsomere to width of second protarsomere, ratio 1.05-1.10.

Aedeagus relatively short with more or less convex ventral side and narrow groove stretching from basal opening to about 1/3 from apex. Apex gradually narrowed. Apical denticle of aedeagus absent.