Gallerucida rufipectoralis Xu & Nie, 2022

Xu, Si-yuan, Nie, Rui-E & Yang, Xing-ke, 2022, Notes on spotted-elytron species of Gallerucida Motschulsky with the description of six new species from China (Coleoptera, Chrysomelidae, Galerucinae), ZooKeys 1116, pp. 33-55 : 33

Gallerucida rufipectoralis Xu & Nie sp. nov.

Figs 36-42

Type material.

Holotype. China: ♂, Yunnan, Lushui / Laochuang, 2430 m // 19-VI-1981 / Shu-Yong Wang, leg. (IZAS).

Paratypes. China: 3♂♂, Yunnan, Lushui / Laochuang, 2430 m // 19-VI-1981 / Shu-Yong Wang, leg.; 1♂, Yunnan, Yunlongxian / Zhibenshan, 2250 m // 21-VI-1981 / Shu-Yong Wang, leg.; 1♂, Yunnan, Yunlongxian / Zhibenshan, 2550 m // 22-VI-1981 / Shu-Yong Wang, leg.; 1♂, Yunnan, Yunlongxian / Zhibenshan, 2550 m // 22-VI-1981 / Su-Bai Liao, leg. (all IZAS).

Description.

Length 5.0-5.5 mm, width 3.0-4.0 mm (n = 7, including holotype). Holotype length 5.3 mm, width 3.1 mm.

Male: Body oval. General color (Figs 36-38 ) black; the first three antennal segments light reddish brown, rest brown; pronotum reddish brown; elytra yellowish brown, basal area of elytra with a gradually blurred black band, subapically with a transverse black stripe; epipleura black; femora dark brown, tibiae and tarsi brown.

Head distinctly narrower than prothorax, occiput sparsely punctures, with a transverse depression; frontoclypeus slightly convex, triangular, with sparsely punctures; frontal tubercle developed, rounded. Antennae longer than 1/2 length of elytron, basal three segments moderately shiny, from 4th segment, covered with fine pale hairs; length ratios of antennomeres I-V, 1.0: 0.5: 0.5: 1.6: 1.2, 3rd and 2nd segment subequal in length, 4th segment longest, 5th -11th segments subequal. Pronotum transverse, approximately twice as broad as long, lateral margin subparallel, anterior margin concave, anterior corner indistinct, basal margin convex, disc area with sparse strong punctures and two shallow transverse depressions. Anterior metasternal process not reaching apex of mesocoxal cavities, surface with punctures. Scutellum triangular, surface smooth. Elytra subparallel-sided, 1.6 × as long as broad, disc slightly convex, with regular punctures in nearly 18 rows, space between punctures larger than the diameter of puncture. Last sternite of male with shallow trilobite concavities (Fig. 39 ).

Aedeagus expanded at 1/2 and 2/3 distance between base to apex, apex sharp in dorsal view, distinctly curved towards ventral side; internal sclerites (Figs 40-42 ), a pair of sclerites bending apically.

Derivatio nominis.

The specific epithet Gallerucida rufipectoralis , is formed from the Latin adjectives rufus (red) and pectoralis (thorax) referring to the pronotum reddish brown.

Distribution.

China: Yunnan.

Diagnosis.

Gallerucida rufipectoralis closely resembles G. sauteri Chûjô, but the former has dark brown femora, black head and ventral surface, subequal 3rd and 2nd segments of the antennae, and punctured pronotum depression.

Figures

Figures 36 - 42. Gallerucida rufipectoralis sp. nov. 36 dorsal view (holotype) 37 ventral view (holotype) 38 lateral view (holotype) 39 ventral view of 5 th ventrite, male (paratype) 40 aedeagus, dorsal view (paratype) 41 ditto, lateral view (paratype) 42 ditto, ventral view (paratype). Scale bars: 5 mm (36 - 38); 1 mm (39 - 42).