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Gastropoda - Bellerophontida - Tropidodiscidae
It was reranked as Tropidodiscus (Temnodiscus) by Williams and Breger (1916).
It was assigned to Tropidodiscus by Williams and Breger (1916); to Tropidodiscinae by Knight et al. (1960); to Bellerophontida by Sepkoski (2002); to Tropidodiscidae by Bouchet et al. (2005); and to Temnodiscinae by Horný (1963) and Wagner (2017).
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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.