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It was reranked as the infraclass Holocephalimorpha by Lund and Grogan (1997); it was misspelled as Holocephalimorpha by Lund and Grogan (2004), Goto and Okura (2004), Nelson (2006) and Long (2011).
It was assigned to Chondrichthyes by Lund and Grogan (1997) and Lund and Grogan (2004); and to Holocephali by Goto and Okura (2004), Nelson (2006) and 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.