|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 glabellar outline subcylindrical; anterior end of glabella strongly rounded. Sagittal length of preglabellar field about equal to that of border. Width of interocular area less than width of extraocular area opposite midlength of ocular lobe. Ocular lobes raised above level of glabella.|