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Bivalvia - Protobranchia - Nuculanidae
It was reranked as Nuculana (Poroleda) by Covacevich and Frassinetti (1986).
It was assigned to Nuculana by Covacevich and Frassinetti (1986); to Nuculoida by Sepkoski (2002); and to Nuculanidae by Vokes (1980), Coan et al. (2000) and Spencer et al. (2004).
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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.