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Gastropoda - Sorbeoconcha - Planaxidae
It was assigned to Fossaridae by Martin (1904), Gardner (1947) and Wilson (1993); to Planaxidae by Todd (2001); to Neotaenioglossa by Sepkoski (2002); and to Fossarinae by Bouchet et al. (2005) and Bandel (2006).
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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.