|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Redlichiida - Archaeaspididae
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.
|A. R. Palmer and L. N. Repina 1993||Archaeaspididae with glabella slightly ta- pered forward, sides slightly concave; anterior end strongly rounded. Posterior tips of ocular lobes about opposite inidlength of 1,1. Width of interocular area about equal to width of extraocular area. Sagittal length of border about equal to that of preglabellar field.|