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It was recombined as Oestocephalus remex by Cope (1869) and Hay (1902); it was recombined as Ctenerpeton remex by Carroll et al. (1998).
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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.