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Cephalopoda - Ceratitida - Trachyceratidae
It was reranked as the family Sirenitidae by Konstantinov (1999).
It was assigned to Arpaditidae by Tozer (1980) and Tozer (1981); to Trachycerataceae by Konstantinov (1999); and to Trachyceratidae by Tozer (1994), Lukeneder and Lukeneder (2014) and Urlichs (2017).
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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.