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Cephalopoda - Ammonitida - Deshayesitidae
It was misspelled as Dufrenoya by Sepkoski (2002); it was reranked as Dufrenoyia by Casey (1980), Renz (1982) and Barragán and Maurrasse (2008).
It was assigned to Parahoplites by Kilian and Reboul (1915); to Ammonoidea by Casey (1980); to Ammonoidea by Sepkoski (2002); and to Deshayesitinae by Stoyanow (1949), Renz (1982) and Barragán and Maurrasse (2008).
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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.