Inter-generic differences in the metafemoral apodeme of flea beetles (Chrysomelidae: Alticinae)

Abstract. The metafemoral apodeme, an essential element of the unique jumping mechanism in the chrysomelid subfamily Alticinae (flea beetles), was studied in fifty-three Palearctic species of twenty-six genera. Inter-generic differences are noted and these genera separate into seven groups according to their apodeme structure. The significance of the metafemoral apodeme in phylo-genetic relationships at the generic and subfamilial level is discussed.