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Asteroidea - Platyasterida
It was reranked as the order Uractinida by Blake (1989) and Sepkoski (2002); it was corrected as Uractinina by Spencer and Wright (1966), Blake and Guensburg (1993) and Blake and Rozhnov (2007).
It was assigned to Hemizonida by Spencer (1951), Lehmann (1957) and Owen (1965); to Forcipulatida by Spencer and Wright (1966); to Asteroidea by Blake (1989), Blake and Guensburg (1993) and Sepkoski (2002); and to Platyasterida by Blake and Rozhnov (2007).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.