Gallerucida fortispina Xu & Yang sp. nov.

Figs 1-7

Type material.

Holotype. China: ♂, Guangxi, Nape, Nongxin / 1000 m / 12-IV-1998, Chao-Dong Zhu, leg. (IZAS).

Paratypes. China: 1♂, Guangxi, Nape, Beidou / 550 m / 12- IV-1998, Chun-Sheng Wu, leg.; 1♂, Guangxi, Nape, Beidou / 550 m / 10-IV-1998, Chao-Dong Zhu, leg.; 1♂, Guangxi, Nape, Beidou / 550 m / 10-IV-1998, Tian-Shan Li, leg. (all IZAS).

Description.

Length 7.5-8.0 mm, width 4.0-5.0 mm (n = 4, including holotype). Holotype length 7.5 mm, width 4.0 mm

Male: Body oval. General color (Figs 1-3) light yellow; first three segments of antennae yellowish brown, rest brown; head and scutellum black; basal area and apical area of elytra with black bands, epipleura and suture dark brown; meso- and meta- sternum, abdomen brown except apical of anterior metasternal process light yellow; femora light yellow, tibiae and tarsi brown.

Head distinctly narrower than prothorax; occiput slightly convex, with sparsely punctures; frontoclypeus surface smooth; frontal tubercle developed, triangular. Antennae longer than 1/2 length of elytra, basal three segments moderately shiny, from 4th segment, covered with fine pale hairs; length ratios of antennomeres I-V 1.0: 0.3: 0.3: 1.1: 0.9, in length 3rd and 2nd segment subequal, 4th segment longest, 5th-11th segment subequal. Pronotum transverse, ~ 2.5 × as broad as long; lateral margin subparallel, anterior margin concave, anterior corner indistinct, basal margin convex; disc area impunctate, middle area with a transverse shallow depression. Anterior metasternal process extending obviously beyond the front edge of the meso-coxal cavities, surface smooth. Scutellum triangular, smooth and impunctate. Elytra 1.5 × as long as broad, lateral margin after half evenly narrowing; disc slightly convex, with fine regular punctures, space between punctures larger than the diameter of puncture; epipleura surface smooth. Last sternite of male with distinct trilobite concavities, middle lobate wave-like (Fig. 4).

Aedeagus almost parallel-sided from base to apex in dorsal view, apex obtuse angled, slightly curved towards ventral side; internal sclerites strong (Figs 5-7), median longitudinal sclerite almost reaching apex of aedeagus, with apex enlarged; a pair of lateral longitudinal sclerites, converging apically.

Derivatio nominis.

The specific epithet Gallerucida fortispina is formed from the Latin adjective fortis (strong) and the Latin noun spina (spine); it refers to the endophallic sclerite complex.

Distribution.

China: Guangxi.

Diagnosis.

Gallerucida fortispina closely resembles G. sauteri Chûjô, but the former has a larger body size, black head, light yellow impunctate pronotum, irregularly punctate elytra, light yellow femora, and metasternal process exceeding mesosternum.