On the leaf beetle genus longitarsus berthold, 1827 from the caucasus, with the description of a new species (coleoptera, chrysomelidae, galerucinae, alticini)

A new species of leaf beetle, Longitarsus kovali Romantsov sp. n., is described from Abkhazia. A new key to distinguish the new and the closely related species L. fulgens (Foudras, 1860), L. languidus Kutschera, 1863, L. medvedevi Shapiro, 1956 and L. tristis Weise, 1888 is proposed. Syntypes of L. ratshensis Khnzorian, 1962 are revised, the lectotype is designated, photographs of the adult habitus in dorsal view and the genitals for both sexes of this species are provided for the first time. Differences between this species and the closely related L. ledouxi Doguet, 1979 are presented. Longitarsus medvedevi is recorded from Kazakhstan for the first time.