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Gastropoda - Neogastropoda - Drilliidae
It was reranked as Drillia (Clavus) by Abrard (1822); it was reranked as Pleurotoma (Clavus) by Smith (1882).
It was assigned to Drillia by Abrard (1822); to Pleurotoma by Smith (1882); to Drilliinae by Wilson (1994); to Neogastropoda by Sepkoski (2002); to Turridae by Durham (1944) and Baluk (2003); and to Drilliidae by Bouchet 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.