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Rhynchonellata - Orthida - Dicoelosiidae
It was corrected as Dicaelosia by Amsden (1951).
It was assigned to Dalmanellacea by Amsden (1951); to Orthida by Sepkoski (2002); and to Dicoelosiidae by Wright (1964), Bassett and Cocks (1974), Mitchell (1977), Jin and Chatterton (1997), Williams et al. (2000) and Rubel (2011).
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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.