Classification of the superorder Squalea

Superor. †Squalea Shirai 1996
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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 annectans Woodward 1919
†Protospinax bilobatus Underwood and Ward 2004
†Protospinax carvalhoi Underwood and Ward 2004
†Protospinax magnus Underwood and Ward 2004
†Protospinax planus Underwood 2002
G. †Microtoxodus Delsate 2003
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†Microtoxodus gulakmani Delsate 2003