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It was reranked as the superorder Septibranchia by Nevesskaja (2009); it was reranked as the unranked clade Septibranchia by Bieler and Mikkelsen (2006), Bouchet et al. (2010) and Hickman (2014).
It was assigned to Anomalodesmata by Ward and Blackwelder (1987) and Coan et al. (2000); to Heterodonta by Bieler and Mikkelsen (2006); to Bivalvia by Nevesskaja (2009); to Pholadomyida by Bouchet et al. (2010); and to Anomalodesmata by Hickman (2014).
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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.