Gallerucida nigrovittata Xu & Yang, 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 nigrovittata Xu & Yang sp. nov.

Figs 15-21

Type material.

Holotype. China: ♂, Yunnan, Jinping, He-tou-zhai, 2000 m / 10-V-1956 / Ke-Ren Huang et al., leg. (IZAS).

Paratype. China: 3♂♂, Yunnan, Jinping, He-tou-zhai, 2000 m / 10-V-1956 / Ke-Ren Huang et al., leg. (all IZAS).

Description.

Length 5.0-5.5 mm, width 3.0-3.5 mm. (n = 4, including holotype). Holotype length 5.3 mm, width 3.3 mm.

Male: Body oval. General color (Figs 15-17 ) black; antennae brown; elytra yellow, basal and subapical area of each elytron with transverse black stripe; 1/3 of epipleura black, rest yellow-brown; meso- and meta- sternum brown or black; ventral surface of abdomen reddish brown; tibiae and tarsi brown or black.

Head narrower than prothorax; occiput distinctly concave, with sparse faint punctures; frontoclypeus surface smooth; frontal tubercle developed, nearly square. 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: 2.0: 1.6, 3rd segment and 2nd segment subequal, 4th segment longest, 5th-11th segments subequal. Pronotum transverse, ~ 2.2 × as broad as long, lateral margin rounded, after middle slight narrow, anterior margin concave, anterior corner distinct, basal margin convex, disc area with a pair of distinct transverse depressions with strong punctures;anterior metasternal process reaching apex of mesocoxal cavities, surface smooth. Scutellum triangular, impunctate. Elytra subparallel-sided, 1.4 × as long as broad, disc slightly convex, with regular punctures, space between punctures larger than diameter of puncture, moderately punctured in rows, ~ 14 rows across central portion. Last sternite of male with slight trilobite concavities (Fig. 18 ).

Aedeagus slightly broadened in the apical area of dorsal view, apex forming distinct obtuse angle, curved slightly towards ventral side; internal sclerites (Figs 19-21 ): median sclerite longitudinal, slim in apex, reaching to 2/3 length of aedeagus, a pair of lateral longitudinal sclerites, convergent apically.

Derivatio nominis.

The specific epithet Gallerucida nigrovittata , is formed from the Latin adjective niger (black) and the Latin adjective vittata (banded) referring to the transverse subapical black stripe on the elytron.

Distribution.

China: Yunnan.

Diagnosis.

Gallerucida nigrovittata closely resembles G. sauteri Chûjô, but the former differs in having a black pronotum, brown or blackish brown antennae, brown or black meso- and meta- sternum and reddish brown abdomen.

Figures

Figures 15 - 21. Gallerucida nigrovittata sp. nov. 15 dorsal view (holotype) 16 ventral view (holotype) 17 lateral view (holotype) 18 ventral view of 5 th ventrite, male (paratype) 19 aedeagus, dorsal view (paratype) 20 ditto, lateral view (paratype) 21 ditto, ventral view (paratype). Scale bars: 5 mm (15 - 17); 1 mm (18 - 21).