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Gastropoda - Aporrhaidae
It was reranked as Perissoptera (Hemichenopus) by Allan (1926).
It was assigned to Perissoptera by Allan (1926); to Neotaenioglossa by Sepkoski (2002); to Aporrhaidae by Nielsen (2005); and to Struthiopterinae by Kollmann (2009).
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.