Intertaxon relationships
species
Watercress
Nasturtium officinale W.T.Aiton
Amalorrhynchus melanarius (Stephens, 1831)
Ceutorhynchus pervicax Weise, 1883 
Ceutorhynchus sulcatus C. N. F. Brisout de Barneville, 1869
Lixus myagri Olivier, 1807