Classification of Morishita 1964

Fm. Cidaridae Gray 1825
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Fm. Echinoneidae Agassiz and Desor 1847
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G. Echinoneus Leske 1778
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Fm. †Toxasteridae Lambert 1920
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G. †Enallaster d'Orbigny 1853
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Enallaster yuasensis Tanaka and Okubo 1954