Parent taxon: Acanthodii according to P. Janvier and M. S. Riglos 1986
See also Denison 1979 and Sepkoski 2002
Sister taxa: Acanthodi, Acanthodida, Acanthodiformes, Antarctonchus, Archaeacanthus, Byssacanthoides, Campylodus, Climatiida, Climatiiformes, Diplacanthi, Diplacanthiformes, Eupleurogmus, Gemuendolepis, Haplacanthus, Homacanthus, Ischnacanthiformes, Latviacanthus, Lupopsyroides, Lupopsyrus, Machaeracanthidae, Monopleurodus, Neoasiacanthus, Nodacosta, Nodonchus, Onchidae, Paucicanthus, Pinnacanthus, Promesacanthus, Ptychodictyon, Seretolepis, Striacanthus, Tchunacanthidae, Yealepis
Subtaxa: Atopacanthus
Ecology: nektonic carnivore
Distribution:
• Devonian of Bolivia (1 collection), Germany (2), Iran (1), the Russian Federation (2), United States (3: New York)
Total: 9 collections including 10 occurrences