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Gastropoda - Vitrinellidae
It was reranked as Vitrinella (Circulus) by Maury (1917).
It was assigned to Vitrinella by Maury (1917); to Cyclostrematidae by Gardner (1948); to Adeorbinae by Marquet (1997); to Adeorbiidae by Lozouet (1998); to Vitrinellidae by Gardner (1947), Todd (2001) and Wienrich (2001); and to Archaeogastropoda 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.