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Gastropoda - Ataphridae
It was reranked as Homalopoma (Argalista) by Fleming (1966).
It was assigned to Homalopoma by Fleming (1966); to Homalopomatinae by Beu et al. (1990); to Colloniidae by Wilson (1993); and to Archaeogastropoda 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.