†family Rhachiosteidae Stensiƶ 1963 (armour-plated fish)
Placodermi - Phlyctaeniiformes - Rhachiosteidae
Alternative spelling: Rachiosteidae
Parent taxon: Pachyosteomorphi according to R. van der Laan 2019
See also Denison 1975, Denison 1978 and Denison 1984
Sister taxa: Dunkleosteidae, Dunkleosteoidea, Kiangyousteus, Panxiosteidae
Subtaxa: Rachiosteus
Ecology: nektonic carnivore
Distribution: found only at Bad Wildungen site (Devonian of Germany)