Classification of Dean 1983

Cl. †Trilobita Walch 1771 [trilobite]
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G. †Dreyfussina Hupé 1956
Or. †Asaphida Salter 1864
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Fm. †Trinucleidae Hawle and Corda 1847
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Invalid names: Marrolithinae Hughes 1971 [empty]
Or. †Phacopida Salter 1864
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Fm. †Calymenidae Milne-Edwards 1840
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Subfm. †Colpocoryphinae Hupe 1955
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G. †Colpocoryphe Novak and Perner 1918
Subfm. †Reedocalymeninae Hupe 1955
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G. †Calymenella Bergeron 1890
Fm. †Dalmanitidae Vogdes 1890
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Invalid names: Acastinae Delo 1935 [empty], Dalmanitininae Destombes 1972 [empty]
Fm. †Asaphidae Burmeister 1843
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Subfm. †Asaphinae Burmeister 1843
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G. †Nobiliasaphus Pribyl and Vanek 1965