Meishania cangshanensis Konstantinov, Ruan and Prathapan, 2018

Ruan, Yongying, Konstantinov, Alexander S., Prathapan, K. D., Zhang, Mengna, Jiang, Shihong & Yang, Xingke, 2018, New contributions to the knowledge of Chinese flea beetle fauna (III): revision of Meishania Chen & Wang with description of five new species (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4403 (1), pp. 186-200 : 192-194

3. Meishania cangshanensis Konstantinov, Ruan and Prathapan , new species

( Fig. 3 )

Etymology: This new species is named after the type locality.

Distribution: China (Yunnan).

Description: Body length: 2.00– 2.10 mm. Body width: 1.20–1.30 mm. Body length to width ratio: 1.62–1.67. Pronotum width to length ratio: 1.65–1.75. Pronotum width at base to width at apex ratio: 1.30–1.35. Elytron length (measured along suture) to width of both ratio: 1.15–1.20. Length of elytron to length of pronotum ratio: 2.73–2.83. Width of elytra at base (measured across middle of humeral callus) to width of pronotum at base ratio: 1.15–1.25.

Dorsum dark blue with strong metallic luster. Antennomeres 1–3 light brown, 4–11 dark brown. Legs dark brown; femoro-tibial joints lighter in color. Body ovate in dorsal view.

Vertex glabrous, lacks punctures, except one large supraorbital pore on each side near eye. Antennal calli poorly delimited. Supracallinal, supraantennal, and suprafrontal sulci poorly developed. Frontal ridge wider between antennal sockets than near clypeus. Midfrontal sulcus distinct, long and straight. Supraorbital and orbital sulci deep. Width of frontal ridge to antennal sockets (excluding surrounding ridges) ratio: 0.85–0.95. Distance between eyes (just above antennal sockets) to transverse diameter of eye in frontal view ratio: 2.30–2.35. Longitudinal diameter of eye to transverse diameter of eye in frontal view ratio: 1.90–1.95. Anterior margin of labrum straight.

Proportions of antennomeres as follows: 14:6:6:6:8:9:10:10:12:13:20. Length to width ratio of antennomere 9: 1.55–1.60; antennomere 10: 1.90–1.95; antennomere 11: 2.53–2.58.

Pronotal punctures much smaller than those on elytra, with diameter 3–4 times smaller than distance between them. Lateral margins of pronotum gently convex, converging forward. Pronotal base slightly sinuate. Anterolateral callosity weak, protruding anteriorly; posterolateral callosity poorly developed.

Elytra with subparallel lateral margins, punctures closely placed, entirely confused.

Length (excluding trochanter) to maximum width ratio of metafemur: 2.32–2.42. First protarsomere of male, length to width ratio (in dorsal view): 1.75–1.85. First metatarsomere of male, length to width ratio (in dorsal view): 2.20–2.25. Length of first metatarsomere to length of second metatarsomere ratio: 1.65–1.75.

Aedeagus short and robust. In lateral view, aedeagus strongly bent at middle, with apex slightly bent ventrally. In ventral view, sides of aedeagus nearly parallel; apex narrowing abruptly.

Spermathecal receptacle gently convex along inner side, outer side strongly convex towards apex near pump, a little concave proximally, 2.4 times longer than maximum width. Receptacle proximally narrower than apically, widest near apex. Horizontal part of pump subequal to vertical, narrowed apically. Duct shorter than receptacle, not coiled, curved towards duct. Posterior sclerotization of tignum broad, subtriangular, with concave apical margin. Vaginal palpi together about 1.6 times wider than long, entirely fused with each other along middle, each broad and round distally.

Diagnosis: Meishania cangshanensis sp. nov. resembles Meishania bhutanensis sp. nov. in having entirely metallic blue dorsum. However, it may be distinguished from M. bhutanensis sp. nov. by the lighter color of antennae and legs: in M. cangshanensis sp. nov., antennae and legs are entirely yellow brown, with metafemora slightly darker; while in M. bhutanensis sp. nov., antennomeres 1–3 are deep yellow brown, 4–11 dark brown and the legs are entirely dark brown.

Types: Holotype: ♂, labels: 1) China, Yunnan, env. Dali, Cangshan Mts. , 06.IV.2002, 3700 – 3500m, forest/ trail, N25°41'06'', E100°06'13'', leg. A. Kontantinov & M. Volkovitsh, 2) Holotype, Meishania cangshanensis n. sp. des Konstantinov & Ruan, 2016 (IZCAS),

Paratypes: 2♀, China, Yunnan, env. Dali, Cangshan Mts. , 06.IV.2002, 3700– 3500m, forest/trail, N25°41'06'', E100°06'13'', leg. A. Kontantinov & M. Volkovitsh, Paratype, Meishania cangshanensisi n. sp. des Konstantinov & Ruan, 2016 ( USNM).

Figures

FIGURE 3. Meishania cangshanensis sp. nov. A: habitus (Holotype, male). B: prothorax, dorsal view (Holotype). C: head, frontal view (Holotype). D: aedeagus, ventral view (Holotype). E: aedeagus, lateral view (Holotype). F: apex of aedeagus, dorsal view (Holotype). G: vaginal palpi (Paratype). H: spermatheca (Paratype). I: tignum (Paratype). J: foreleg, female (Paratype), red arrow indicates enlarged disc-like third tarsomere.K: pygidium of female (Paratype).