Gallerucida piceusfasciata 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 piceusfasciata Xu & Yang sp. nov.

Figs 29-35

Type material.

Holotype. China: ♂, Sichuan, Badan / 19-X-1979 // unknown, leg. (IZAS).

Paratype. China: ♀, Sichuan, Badan / 19-X-1979 // unknown, leg. (IZAS; destroyed).

Description.

Length 6.5-6.8 mm, width 3.8 mm (n = 2, including holotype). Holotype length 6.8 mm, width 3.8 mm

Male: Body oval. General color (Figs 29-31 ) generally dark green with metallic luster; first three segments of antennae dark green, rest brown; elytra with four pairs of yellow stripes, one pair at elytron humerus, second pair transverse stripe with vertical extension located in 1/3 elytron, near suture, third pair at middle area forming irregular waved stripes, last pair subapical forming a circle; epipleuron yellow; apical of anterior metasternal process and first visible abdomen sternite yellowish brown; tibiae and tarsi brown.

Head distinctly narrower than prothorax, occiput and frontoclypeus with strong punctures and distinct hairs, frontal tubercle developed. Antennae reaching 1/2 length of elytron, basal three segments with long hairs, remaining segments covered with short pale hairs; length ratios of antennomeres I-V, 1.0: 0.5: 0.5: 1.6: 1.5, 3rd and 2nd segment subequal in length, length from 4th segment decreased gradually. Pronotum transverse, ~ 1.8 × as broad as long, lateral margin rounded, anterior margin concave with dense setae, anterior corner distinct, basal margin convex, posterior corner distinct, disc area with densely strong punctures. Anterior metasternal process not reaching apex of mesocoxal cavities, surface smooth, sides with hairs. Scutellum triangular, rounded apically, with faint punctures. Elytra subparallel-sided, 1.4 × as long as broad, disc slightly convex, with irregular punctures in two sizes, space between smaller punctures little larger the diameter of punctures, space between larger punctures smaller the diameter of punctures. Last sternite of male with shallow trilobite concavities (Fig. 32 ).

Aedeagus almost parallel-sided from base to apex in dorsal view, apex obtuse angled, slightly curved towards ventral side; internal sclerites (Figs 33-35 ): median sclerite longitudinal, slight longer than lateral sclerites in length, apically bending; a pair of lateral sclerites close to each other at apical area.

Derivatio nominis.

The specific epithet Gallerucida piceusfasciata , is formed from the Latin adjectives, piceus (dark green) and fasciata (banded); referring to the elytra being general dark green with yellow bands.

Distribution.

China: Sichuan.

Diagnosis.

This species is similar to Gallerucida bifasciata Motschulsky. The main differences are the following: G. piceusfasciata has subequal 2nd and 3rd antennal segments, sparsely punctured scutellum, and two types of large and small irregular punctures on the elytra.

Figures

Figures 29 - 35. Gallerucida piceusfasciata sp. nov. (holotype) 29 dorsal view 30 ventral view 31 lateral view 32 ventral view of 5 th ventrite, male 33 aedeagus, dorsal view 34 ditto, lateral view 35 ditto, ventral view. Scale bars: 5 mm (29 - 31); 1 mm (32 - 35).