Smaragdina tianmuensis, Wang, Feng-Yan & Zhou, Hong-Zhang, 2013

Wang, Feng-Yan & Zhou, Hong-Zhang, 2013, Four new species of the genus Smaragdina Chevrolat, 1836 from China (Coleoptera: Chrysomelidae: Cryptocephalinae: Clytrini), Zootaxa 3737 (3), pp. 251-260 : 252

Smaragdina tianmuensis sp. nov.

( Figs. 1 A–I, 5A).

Type material. Holotype: CHINA: Zhejiang: ♂, T’ienmu Shan, 1937. V.29, leg. O. Piel (IZ-CAS). Paratypes: CHINA: Zhejiang: 1♂, 2♀♀, same data as holotype (IZ-CAS).

Measurement. Length: males: 4.5–4.6mm, females: 5.2–5.3mm. Width: males: 2.4–2.5mm, females: 2.6– 2.8mm.

Etymology. The specific epithet refers to the type locality “Tianmu”.

Diagnosis. The new species differs from other congeneric species by its unique coloration: pronotum fulvous with central royal purple markings, elytra bluish black with yellow apex. Also, the aedeagus is characteristic: apex of median lobe very long and bent ventrally, apical median underside with a distinct ridge.

Description. Coloration pattern: head black, mandibles black with brown tips, labrum blackish brown, anterior margin paler, underside of mouth parts brown; basal four antennomeres light brown, while 5th–11th antennomeres darker. Pronotum fulvous with a broad central royal purple stripe, anterior 1/3 of stripe occupying 1/ 3 of pronotum width, posterior 2/3 of stripe about 3/5 width of pronotum. Scutellum bluish black. Elytra bluish black with yellow apex, epipleura fulvous. Underside of body dark brown except for fulvous prothorax. Legs fulvous, femora, outer sides of tibiae and tarsi more or less brown.

Body: oval. Head: small. Mandibles short, labrum slightly incised at anterior margin, length ratio of maxillary palpomeres 0.3:0.6:0.6:0.8; while that of labial palpomeres 0.5:1.5:1.7; mentum widely U-shaped emarginate. Clypeus smooth, sides slightly depressed, anterior margin feebly incised; frons covered with dense wrinkles and sparse punctures, as well as three triangularly placed small impressions; inner sides of eyes covered with short pubescence; vertex slightly convex, lateral sides rugous, medial surface glabrous. Antennae: extending to base of prothorax, pubescent, 1st antennomere oblong, 2nd rounded, 3rd slender, 4th triangular, a little longer than the third one, serrated from 5th segment onwards.

Prothorax: transverse, 2.25 times as wide as long, moderately convex; anterior margin slightly concave, lateral margins slightly rounded, convergent anteriad, posterior margin sinuated; anterior angles rectangular, posterior ones broadly rounded, all margins especially the lateral ones bordered; surface lustrous, anteriorly with a shallow and long transverse impression, basal median area with sparse punctation. Scutellum widely triangular, impuncate; basal half clothed with pale short hairs, apical half moderately elevated, with a median ridge.

Elytra: cylindrical, 1.5 times as long as wide at humeral part, covered with confused punctation, interstices as wide as one to five times of a puncture diameter, punctures becoming sparse posteriorly, and nearly disappearing in elytral apices.

Underside and legs: thickly clothed with silvery pubescence; apex of pygidium arcuate. Tarsi slender, length ratio of protarsomeres 1.9:1.3:0.3:2.2.

Aedeagus: Apex of median lobe very long and bent ventrally, apical median underside with a distinct ridge, without pubescence, lateral arms of the aedeagus wide and moderately emarginated.

Female. Body robuster than males; Pygidium: posterior border of pygidium excavated; Spermatheca: hookshaped, spermathecal duct base thickened, uncoiled, then becoming thinner, and spirally coiled about 20 to 30 times. Rectal apparatus: ventral sclerites of rectal apparatus large, dorsal central sclerite produced medially; lateral ones with small teeth.

Figures

FIGURE 1. Smaragdina tianmuensis sp. nov.: (A) habitus; (B) maxilla; (C) labium; (D) male genitalia in dorsal view; (E) male genitalia in lateral view; (F) male genitalia in ventral view; (G) spermatheca; (H) ventral rectal sclerites; (I) dorsal rectal sclerites. Scales = 0.5 mm.