|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was reranked as the order Nautiloidea by Martin (1904).
It was assigned to Tetrabranchiata by Martin (1904); and to Cephalopoda by Sweet (1958), Teichert et al. (1964), Wells and Houston (2001), Evans (2005), Landman et al. (2007), Evans (2011) and Lehmann et al. (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.