On the type specimens of representatives of the subgenus Apterosoma Motschulsky, 1861 of the genus Chrysolina Motschulsky, 1861 (Coleoptera, Chrysomelidae)

Classification of the subgenus Apterosoma Motschulsky of the genus <i>Chrysolina</i> is fraught with several problems. In particular, the northern Japanese <i>Apterosoma</i> can be separated into at least 20 morphologically and/or genetically distinct, yet undescribed, "units". In this study, we examine type specimens of the three species included within the subgenus to determine their relationships to these units and to each other.