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

Placodermi - Phlyctaeniiformes

Parent taxon: Brachythoraci according to R. van der Laan 2019

See also Carr and Hlavin 2010

Sister taxa: Brachydeiroidea, Buchanosteidae, Buchanosteoidea, Coccosteoidea, Coccosteomorphi, Dinichthyoidea, Doseyosteus, Gemuendenaspidae, Heterosteoidea, Homosteoidea, Homostiidae, Maideria, Pachyosteomorphi, Parabuchanosteidae

Subtaxa: Brachydeiridae Braunosteidae Bulbocanthidae Dinichthyidae Gorgonichthys Hadrosteidae Heintzichthys Leiosteidae Leptosteidae Titanichthyidae

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Ecology: nektonic carnivore

Distribution:

• Devonian of Australia (3 collections), Canada (1: Manitoba), Czechia (1), Germany (1), Iran (1), Poland (2), United States (11: Iowa, Michigan, Missouri, Ohio, Wisconsin, Wyoming, ohio)

Total: 20 collections including 44 occurrences

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