Classification of Kriwet 2003

Or. Squaliformes Goodrich 1909
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Fm. Squalidae Bonaparte 1834 [dogfish shark]
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G. †Squalogaleus Maisey 1976
Unr. Neoselachii Compagno 1977
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Invalid names: Galeoidea Hay 1902 [empty]
Or. †Synechodontiformes Duffin and Ward 1993
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Fm. †Palaeospinacidae Regan 1906
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G. †Synechodus Woodward 1888
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Synechodus prorogatus Kriwet 2003
Fm. †Protospinacidae Woodward 1919
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G. †Protospinax Woodward 1919