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It was reranked as the subclass Stegocephalia by Kuhn (1946); it was misspelled as Stegocephalia by Huene (1954); it was reranked as the unranked clade Stegocephali by Laurin et al. (2000).
It was assigned to Batrachia by Cope (1875) and Hay (1902); to Amphibia by Moodie (1909), Swinton (1934) and Kuhn (1946); to Batrachomorphoidea by Huene (1954); and to Choanata by Laurin et al. (2000).
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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.