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Anthozoa - Scleractinia - Placocoeniidae
It was corrected as Columnocaenia by Mermighis and Marcopoulou-Diacantoni (2004).
It was assigned to Scleractinia by Sepkoski (2002) and Mermighis and Marcopoulou-Diacantoni (2004); and to Placocoeniidae by El-Asa'ad (1989), Baron-Szabo (2006) and Kiessling (2008).
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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.