|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Chondrichthyes - Eugeneodontiformes
It was corrected as Eugeneodontiformes by Cappetta (1987), Goto and Okura (2004), Nelson (2006), Ginter et al. (2010) and Long (2011).
It was assigned to Chondrichthyes by Sepkoski (2002); to Elasmobranchii by Zangerl (1981), Cappetta (1987) and Goto and Okura (2004); to Paraselachimorpha by Nelson (2006); to Euchondrocephali by Ginter et al. (2010); and to Holocephali by Long (2011).
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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.