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Cephalopoda - Nautilida - Tainoceratidae
It was reranked as Temnocheilus (Metacoceras) by Fliegel (1901).
It was assigned to Temnocheilus by Fliegel (1901); to Nautilida by Sepkoski (2002); and to Tainoceratidae by Teichert et al. (1964), Shimanskiy (1967) and Niko and Mapes (2016).
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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.