†family Trematosteidae Gross 1932 (armour-plated fish)
Placodermi - Arthrodira - Trematosteidae
Parent taxon: Dinichthyoidea according to R. H. Denison 1984
See also Denison 1975 and Denison 1978
Sister taxon: Leiosteidae
Subtaxa: Belosteus Brachyosteus Cyrtosteus Parabelosteus Trematosteus
Ecology: nektonic carnivore
Distribution: found only at Bad Wildungen site (Devonian of Germany)