Classification of Rees 2000

Unr. Neoselachii Compagno 1977
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Fm. †Agaleidae Rees 2000
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G. †Agaleus Duffin and Ward 1983
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†Agaleus dorsetensis Duffin and Ward 1983
Or. Hexanchiformes de Buen 1926
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Fm. Hexanchidae Gray 1851 [cow shark]
Or. †Synechodontiformes Duffin and Ward 1993
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Fm. †Orthacodontidae de Beaumont 1960
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G. †Sphenodus Agassiz 1843
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†Sphenodus longidens Agassiz 1843
Invalid names: Sphenodus helveticus de Beaumont 1960 [nomen dubium]
Fm. †Palaeospinacidae Regan 1906
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G. †Paraorthacodus Glikman 1957
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†Paraorthacodus recurvus Trautschold 1877
G. †Synechodus Woodward 1888
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†Synechodus dubrisiensis Mackie 1863
†Synechodus enniskilleni Duffin and Ward 1993
†Synechodus occultidens Duffin and Ward 1993
Invalid names: Palaeospinax Egerton 1872 [nomen dubium], Palaeospinax priscus Agassiz 1838 [nomen dubium]