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Gastropoda - Eucyclidae
It was synonymized subjectively with Amberleya by Cox (1928); it was reranked as Amberleya (Eucyclus) by Kase (1984).
It was assigned to Amberleya by Kase (1984); to Archaeogastropoda by Sepkoski (2002); and to Eucyclidae by Koken (1896), Bouchet et al. (2005), Bandel (2010) and Ferrari et al. (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.