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Cephalopoda - Ceratitida - Parapopanoceratidae
It was reranked as Popanoceras (Parapopanoceras) by Hyatt and Smith (1905).
It was assigned to Popanoceras by Hyatt and Smith (1905); to Megaphyllitidae by Spath (1951) and McLearn (1969); to Ceratitida by Sepkoski (2002); and to Parapopanoceratidae by Tozer (1981), Tozer (1994) and Korn (2006).
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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.