†family Buchanosteidae White 1952 (armour-plated fish)
Placodermi - Phlyctaeniiformes - Buchanosteidae
Parent taxon: Brachythoraci according to R. van der Laan 2019
See also Denison 1975, Denison 1978 and Denison 1984
Sister taxa: Aspinothoracidi, Brachydeiroidea, Buchanosteoidea, Coccosteoidea, Coccosteomorphi, Dinichthyoidea, Doseyosteus, Gemuendenaspidae, Heterosteoidea, Homosteoidea, Homostiidae, Maideria, Pachyosteomorphi, Parabuchanosteidae
Subtaxa: Buchanosteus Richardosteus
Ecology: nektonic carnivore
Distribution: found only at Taemas-Wee Jasper (Devonian of Australia)