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Gastropoda - Discohelicidae
It was reranked as Discogonius by Sepkoski (2002).
It was assigned to Discohelix by Yin and Yochelson (1983); and to Opisthobranchia 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.