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Gastropoda - Hipponicidae
It was reranked as Capulus (Malluvium) by Woodring (1928); it was reranked as Hipponix (Malluvium) by MacNeil (1960) and Ladd (1972).
It was assigned to Capulus by Woodring (1928); to Hipponix by MacNeil (1960) and Ladd (1972); and to Neotaenioglossa by Sepkoski (2002).
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.