Classification of the order Diadematoida

Or. Diadematoida Duncan 1889
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Fm. Diadematidae Gray 1855
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G. †Australidiadema Smith and Crame 2012
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†Australidiadema alexanderi Smith and Crame 2012
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†Diadema depressum Agassiz 1846
†Diadema pseudodiadema Lamarck 1816
†Diadema subangulare Goldfuss 1826
G. Echinothrix Peters 1853
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†Echinothrix calamaris Pallas 1774
G. †Eodiadema
G. †Kierechinus Philip 1963
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Kierechinus melo Kier 1957
G. †Mesodiadema Neumayr 1889
G. †Sierradiadema Mooi and Hilton 2014
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†Sierradiadema kristini Mooi and Hilton 2014
G. †Engelia
Invalid names: Diadematoina Duncan 1889 [empty]