A Revision Of The Leaf Beetles Of The Poorly Known Chrysolina (Sahlbergiana) Species-Group In The Subgenus Pezocrosita (Coleoptera, Chrysomelidae)

Abstract

Abstract: The subgenus Pezocrosita Jacobson, 1901, genus Chrysolina Motschulsky, 1860, currently includes 38 species, being divided into 7 species-groups. Among them, the Chrysolina (sahlbergiana) group remains the least studied, although it comprises the type species of the subgenus. The latter, Chrysolina sahlbergiana (Jacobson, 1901a), is shown to encompass 2 subspecies: Ch. sahlbergiana sahlbergiana and Ch. sahlbergiana jacobsoni (Lopatin, 1970). An amended description of Chrysolina hyperboreica Mikhailov, 2002, a local species endemic to the northern Ural Mountains within Sverdlovsk Province and previously known only from the male holotype, is given based on new material. A new species, Ch. korgonicasp. n., is described from western Altai. A key is given to all the four species of the group. The relict character of the Chrysolina (sahlbergiana) group is discussed based on disjunct distributions of its species and their associations with the former tundra-steppe communities. © 2021, Pleiades Publishing, Ltd.