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Gastropoda - Neritidae
It was reranked as Neritina (Clithon) by Martin (1916); it was reranked as Theodoxus (Clithon) by Ladd (1934) and Oostingh (1935).
It was assigned to Neritina by Martin (1916); to Theodoxus by Ladd (1934) and Oostingh (1935); and to Neritidae by Ladd (1966) and Jensen (1996).
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.