Two new species of the nominotypical subgenus Gonioctena Chevrolat, 1836, from China and Laos, and a proposed new species-group (Coleoptera: Chrysomelidae: Chrysomelinae)

Abstract

The Gonioctena kanfani species-group of the nominotypical subgenus Gonioctena Chevrolat, 1836 is proposed and reviewed. This group comprises the following five species, including two new to science, distributed in eastern China and northern Laos: G. kanfani (Chen, 1941), G. kamikawai (Chûjô, 1958), G. fujiana Cho & Borowiec, 2016, G. jolantae new species, and G. lukasi new species. Members of this species-group are easily distinguished from other species by their metallic lustre, two yellowish-brown markings on the elytral humeri, and the trifurcated tip of the flagellum of the aedeagus. Photographs of habitus, illustrations of male genitalia, and diagnostic characters for each species are given. A distribution map and literature records are also provided.

First Record of the Subgenus Gonioctena (Coleoptera: Chrysomelidae) from Vietnam, with Description of a New Species

“…Gonioctena ( Gonioctena ) jolantae Cho, 2022: 113 (type locality: Laos, Houaphanh province, Phou Pan Mountain).…”

“…Material examined . 1 female (HCC), “Lai Chau, Vietnam, 6/2022 // Gonioctena jolantae Cho, 2022 det. H.W.…”

“…The chrysomelid genus Gonioctena Chevrolat, 1836 encompasses nearly 120 species found in the Palaearctic, Nearctic, and Oriental regions (Cho 2022). Adult Gonioctena are characterised by the following features: mid and hind tibiae with large angular sub-apical projections; appendiculate tarsal claws; elytral epipleura visible in lateral view; well-developed hind wings; and procoxal cavities open at the posterior.…”

Revision of Aplosonyx Chevrolat, 1836 (Coleoptera, Chrysomelidae, Galerucinae) from China, with descriptions of three new species

“…The genus Aplosonyx was established by Chevrolat (1836). Galleruca albicornis (Wiedemann, 1821) was designated as type species by Duponchel and Chevrolat (1842).…”