†unranked clade Aspinothoracidi Miles and Dennis 1979 (armour-plated fish)

Placodermi - Arthrodira

Parent taxon: Eubrachythoraci according to R. K. Carr and W. J. Hlavin 2010

Sister taxa: Homostius, Pachyosteomorphi

Subtaxa: Dinichthyidae Gorgonichthys Hadrosteus Heintzichthys

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Ecology: nektonic carnivore

Distribution:

• Devonian of Australia (1 collection), Canada (1: Manitoba), Iran (1), Poland (1), United States (4: Iowa, Missouri, Ohio, ohio)

Total: 8 collections including 12 occurrences

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