|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
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.
|J. S. Hollingsworth 2007||An archaeaspidid with cephalon rounded posterolaterally, genal spine small or absent. Cephalon and glabella only gently arched dorsally. Preglabellar field wide (sag.). Interocular area variably sloped dorsally, width (tr.) about equal to extraocular area width.|