Classification of Underwood and Ward 2004

Unr. Neoselachii Compagno 1977
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Superor. †Hypnosqualea Carvalho and Maisey 1996
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Fm. †Protospinacidae Woodward 1919
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G. †Breviacanthus Maisey 1976
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†Breviacanthus brevis Philips 1871
G. †Protospinax Woodward 1919
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†Protospinax bilobatus Underwood and Ward 2004
†Protospinax carvalhoi Underwood and Ward 2004
†Protospinax magnus Underwood and Ward 2004
Superor. †Squalea Shirai 1996
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Or. Hexanchiformes de Buen 1926
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G. †Paranotidanus Ward and Thies 1987
Or. Rajiformes Berg 1940 [ray]
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Fm. Rhinobatidae Müller and Henle 1837
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G. †Belemnobatis Thiollière 1854
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†Belemnobatis kermacki Underwood and Ward 2004
†Belemnobatis stahli Underwood and Ward 2004
G. †Spathobatis Thiollière 1849
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†Spathobatis delsatei Underwood and Ward 2004
Or. †Synechodontiformes Duffin and Ward 1993
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Fm. †Palaeospinacidae Regan 1906
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G. †Synechodus Woodward 1888
Fm. †Pseudonotidanidae Underwood and Ward 2004
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G. †Pseudonotidanus Underwood and Ward 2004
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†Pseudonotidanus semirugosus Underwood and Ward 2004
G. †Welcommia Cappetta 1990
Invalid names: Galea Shirai 1996 [empty]