†family Ptyctodontidae Woodward 1891 (armour-plated fish)
Placodermi - Ptyctodontida - Ptyctodontidae
Parent taxon: Ptyctodontida according to R. H. Denison 1985
See also Bryant 1932, Denison 1975, Denison 1978, Hay 1902 and Jordan 1963
Sister taxa: Denisonodus, Rhamphodopsis, Tollodus
Subtaxa: Acmoniodus Bulbocanthus Chelyophorus Ctenurella Desmoporella Eczematolepis Goniosteus Palaeomylus Ptyctodopsis Ptyctodus Ramphodus Rhynchodus Rinodus
Ecology: nektonic carnivore
Distribution:
• Carboniferous of the United Kingdom (1 collection)
• Devonian of Belarus (2), Germany (2), Iran (1), Poland (1), the Russian Federation (2), United States (5: Iowa, Missouri, Wyoming)
Total: 14 collections including 18 occurrences