17 spp. (in 3 subgenera) in our area(1)
Species determination in this genus is difficult. Confident identification often requires long series of specimens, viewing of the ventral areas, and especially knowledge of the host plant. Chrysomela schaefferi is unusual in being rather distinctive. --S.M. Clark
Holarctic; more diverse in the north(1)
Brown W.J. (1956) The New World species of Chrysomela L. (Coleoptera: Chrysomelidae). Canadian Entomologist 88: 1-54.