Drakensbergianella rudebecki, New Genus and New Species from the Mountains of Southern Africa, and Taxonomic Observations on Gabonia Jacoby and Related Genera (Insecta, Coleoptera, Chrysomelidae, Alticinae)

Drakensbergianella rudebecki, a new genus and new species of flea beetle (Chrysomelidae, Alticinae) found at high elevations from Southern Africa (Drakensberg mountains) is described. This new genus is closely related to the genus Gabonia Jacoby, 1893 but is easily distinguishable mainly by: the metasternum shorter than the length of the middle coxal cavities; the legs with femora and tibiae clearly elongate, especially the hind ones; the antennae generally longer than body in both sexes, especially in males; the metafemoral spring with inner side of the ventral lobe not angled; the metathoracic wings strongly reduced. Line drawings of male and female genitalia, metafemoral springs, and scanning electronic micrographs of particular morphological aspects of the taxa considered are provided. Finally, a brief discussion about Gabonia and related genera in the Afrotropical region with a key for the identification, is also reported. Moreover, the following new combination is proposed: Longitarsus ruandensis Weise, 1910 = Montiaphthona ruandensis Weise, 1910 n. comb.