|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was reranked as the subclass Anaspida by Dineley and Metcalf (1999); it was reranked as the superclass Anaspida by Blom (2008) and Long (2011).
It was assigned to Agnatha by Dineley and Metcalf (1999); to Cephalaspidomorphi by Sepkoski (2002); to Vertebrata by Blom (2008); and to Craniata by Long (2011).
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.