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Tabulata (tabulate coral)
It was reranked as the order Tabulata by Langenheim and McCutcheon (1959); it was reranked as the subclass Tabulata by Sepkoski (2002).
It was assigned to Anthozoa by Langenheim and McCutcheon (1959), Klaamann (1964), Edwards (1988), Sepkoski (2002) and Kiessling (2003).
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.