†family Leptosteidae Jaekel 1911 (armour-plated fish)
Placodermi - Arthrodira - Leptosteidae
Parent taxon: Brachydeiroidea according to R. H. Denison 1984
See also Denison 1975 and Denison 1978
Sister taxon: Brachydeiridae
Subtaxa: Leptosteus
Ecology: nektonic carnivore
Distribution: found only at Bad Wildungen site (Devonian of Germany)