†Polyrhizodus M'Coy 1848 (cartilaginous fish)
Chondrichthyes - Petalodontiformes - Petalodontidae
Parent taxon: Petalodontidae according to M. Ginter et al. 2010
Sister taxa: Antliodus, Chomatodus, Glossodus, Glyphanodus, Harpacodus, Itapyrodus, Lisgodus, Neopetalodus, Petalodus, Tanaodus
Subtaxa: Polyrhizodus attenuatus, Polyrhizodus colei, Polyrhizodus concavus, Polyrhizodus digitatus, Polyrhizodus elongatus, Polyrhizodus magnus, Polyrhizodus pusillus
Ecology: nektonic carnivore