Chaetocnema (Udorpes) greenica Ruan, Konstantinov & Yang, 2019

Ruan, Yongying, Yang, Xingke, Konstantinov, Alexander S., Prathapan, Kaniyarikkal D. & Zhang, Mengna, 2019, Revision of the Oriental Chaetocnema species (Coleoptera, Chrysomelidae, Galerucinae, Alticini), Zootaxa 4699 (1), pp. 1-206 : 157-160

65. Chaetocnema (Udorpes) greenica Ruan, Konstantinov & Yang , New Species

( Figs. 91 , 92 )

Etymology: This species is named after its metallic green color. Specific epithet is a noun in apposition.

Diagnosis: This species is unique and differs from other Oriental Chaetonema species by combination of the following characters: dorsum entirely metallic green, prothorax extremely convex and almost as wide as elytral base, orbital, supraantennal sulci absent, orbit merge with vertex.

Distribution: India.

Host plants: Unknown.

Description: Body length: 2.15–2.25 mm. Body width: 1.19–1.21 mm. Antennae short, ratio of length of an- tenna to length of body: 0.50–0.53. Ratio of elytron length (along suture) to width (maximum): 2.32–2.36. Ratio of pronotum width (at base) to length: 1.61–1.63. Ratio of length of elytron to length of pronotum (along middle): 2.35–2.40. Ratio of width of elytra at base (in middle of humeral calli) to width of pronotum at base: 1.00–1.03.

Dorsum (including head) entirely metallic green, finely reticulate.Antennomeres 1–4 completely yellow brown, 5–11 brown, with apical ones darkened. Tarsi and tibiae yellow brown, with apex somewhat infuscate. Pro- and mesofemora light brown. Metafemora dark brown with metallic green luster.

Head hypognathous. Frontal ridge wide and flat. Ratio of width of frontal ridge to width of antennal socket:

2.10–2.12. Frontolateral sulcus absent. Suprafrontal sulcus narrow, moderately deep, almost straight. Orbital, su- praantennal sulci absent; orbit wide, merge with vertex, extremely closely covered with small punctures and white setae. Frons and vertex evenly covered with small, deep and closely placed punctures and relatively short, white setae.

Base of pronotum without short longitudinal impressions. Pronotal base evenly convex. Deep row of large punctures at base of pronotum absent. Area adjacent to mid-basal margin of pronotum covered with punctures. Pronotum highly convex, anterolateral prothoracic callosity poorly developed, invisible from above. Lateral margins of pronotum strongly convex, converging forward, with maximum width near middle. Posterolateral prothoracic callosity poorly developed. Diameter of pronotal punctures 1.5–3 times smaller than distance between them.

Elytra with convex lateral sides, humeral calli well developed. Scutellar row of elytral punctures somewhat geminate. Second to eleventh rows of elytral punctures regular. Elytral interspaces between puncture rows slightly costate at sides.

Excavation on metatibia not deep. Large lateral denticle on metatibia obtuse. Metatibial serration proximal to large lateral denticle absent.

Spermatheca with receptacle sinuated. Spermathecal pump much shorter than receptacle, with apex flattened. Receptacle basally as wide as apically. Vaginal palpus slightly narrowing from base till middle, thence approximately parallel sided. Anterior sclerotization of vaginal palpus with parallel sides. Posterior sclerotization longer than wide. Posterior sclerotization wider than anterior.

Type: Holotype: ♀ (in USNM): 1) India, Meghalaya State, West Garo Hills, 450m, 25°11'N / 90°51'E; 2) Chaetocnema cognata Baly, 1877 , det Döberl , 2001; 3 ) Holotype; 4) Chaetocnema greenica sp. nov., Des. Ruan, 2016.

Figures

FIGURE 91. Chaetocnema greenica sp. nov. Female habitus (hand drawing).

FIGURE 92. Chaetocnema greenica sp. nov. A Holotype (female), habitus. B Pronotum and peri-scutellar area of Holotype. C Head of Holotype, frontal view. D Vaginal palpi of Holotype. E Spermatheca of Holotype. F Pygidium (tergite 7) of Holotype.