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Bivalvia - Modiomorphida
It was corrected as Modiomorphoidea by Nevesskaja (2009), Bouchet et al. (2010) and Carter et al. (2011).
It was assigned to Actinodontoida by Newell (1965); to Modiomorphoida by Vokes (1980); to Unionoida by Nevesskaja (2009); to Heterodonta by Bouchet et al. (2010); and to Modiomorphida by Carter et al. (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.