†family Ptyctodontidae Woodward 1891 (armour-plated fish)
Placodermi - Ptyctodontiformes - Ptyctodontidae
Synonym: Aulacosteidae Fowler 1947
Parent taxon: Ptyctodontiformes according to R. van der Laan 2019
See also Bryant 1932, Denison 1975, Denison 1978, Denison 1985, Hay 1902 and Jordan 1963
Sister taxa: none
Subtaxa: Acmoniodus Aulacosteus Chelyophorus Ctenurella Desmoporella Eczematolepis Goniosteus Materpiscis Palaeomylus Ptyctodopsis Ptyctodus Ramphodus Rhynchodus Rinodus
Type: Aulacosteus
Ecology: nektonic carnivore
Distribution: