Classification of Duffin 1998

Superor. Squalomorphii Compagno 1973
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Or. †Synechodontiformes Duffin and Ward 1993
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G. †Synechodus Woodward 1888
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†Synechodus rhaeticus Duffin 1982
Unr. Euselachii Hay 1902
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Superfm. †Hybodontoidea Agassiz 1834
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Fm. †Polyacrodontidae Glükman 1964
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†Palaeobates reticulatus Duffin 1998
G. †Polyacrodus Jaekel 1889
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†Polyacrodus holwellensis Duffin 1998