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Bivalvia - Pectinida - Pectinidae
It was reranked as Pecten (Swiftopecten) by Hertlein (1935) and Faustman (1964); it was reranked as Chlamys (Swiftopecten) by Gazdzicki and Pugaczewska (1984) and Kafanov et al. (2001).
It was assigned to Pecten by Hertlein (1935) and Faustman (1964); to Pectinidae by Adegoke (1967); to Chlamys by Gazdzicki and Pugaczewska (1984) and Kafanov et al. (2001); and to Pterioida by Sepkoski (2002).
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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.