†superfamily Heterosteoidea Denison 1984 (armour-plated fish)
Placodermi - Phlyctaeniiformes
Parent taxon: Brachythoraci according to R. H. Denison 1984
Sister taxa: Aspinothoracidi, Beyrichosteus, Brachydeiroidea, Buchanosteidae, Buchanosteoidea, Coccosteoidea, Coccosteomorphi, Dinichthyoidea, Doseyosteus, Gemuendenaspidae, Homosteoidea, Homostiidae, Maideria, Pachyosteomorphi, Parabuchanosteidae
Subtaxa: Heterosteidae
Ecology: nektonic carnivore
Distribution:
• Devonian of China (1 collection), Svalbard and Jan Mayen (1)
Total: 2 collections each including a single occurrence