Classification of Denison 1975
Unr. Gnathostomata Gegenbauer 1874 [jawed fish]
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Cl. †Placodermi M'Coy 1848 [armour-plated fish]
Subcl. †Placodermi M'Coy 1848 [armour-plated fish]
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Or. †Acanthothoraci Stensiö 1944
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Fm. †Palaeacanthaspidae Stensiö 1944
Invalid names: Kolymaspidae Bystrow 1956 [empty], Radotinidae Arambourg 1958 [empty]
Or. †Antiarcha Cope 1885
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Fm. †Asterolepidae Traquair 1888
Fm. †Bothriolepididae Cope 1886
Fm. †Sinolepidae Liu and P'an 1958
Or. †Arthrodira Woodward 1891
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Or. †Coccosteina Heintz 1932
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Fm. †Buchanosteidae White 1952
Fm. †Coccosteidae Asmuss 1856
Fm. †Gemuendenaspidae Miles 1962
Fm. †Homostiidae Jaekel 1903
Fm. †Pholidosteidae Gross 1932
Fm. †Rachiosteidae Stensiö 1963
Subor. †Pachyosteina Obruchev 1964
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Fm. †Dinichthyidae Newberry 1888
Fm. †Leiosteidae Stensiö 1963
Fm. †Mylostomatidae Woodward 1891
Fm. †Selenosteidae Dean 1901
Fm. †Titanichthyidae Dean 1901
Fm. †Trematosteidae Gross 1932
Invalid names: Brachydeirina Denison 1975 [empty], Heterostiina Denison 1975 [empty], Holonematina Denison 1975 [empty]
Or. †Phyllolepida Stensiö 1934
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