|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was reranked as the subclass Arthrodira by Obruchev (1964).
It was assigned to Placodermi by Bryant (1932) and Denison (1975); and to Placodermi by Obruchev (1964), Straka and Semken (1969), Dineley and Metcalf (1999), Young (2010) and Young and Long (2014).
|Year||Name and author|
|1932||Arthrodira Bryant p. 232|
|1964||Arthrodira Obruchev p. 180|
|1969||Arthrodira Straka II and Semken Jr p. 1424|
|1975||Arthrodira Denison p. 23|
|1986||Arthrodiriformes Grande and Eastman|
|1999||Arthrodira Dineley and Metcalf p. 11|
|2010||Arthrodira Young p. 527|
|2011||Arthrodiriformes Long p. 242|
|2014||Arthrodira Young and Long p. 242|
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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.