|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Redlichiida - Nevadiidae
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.
|L. E. Babcock and J. S. Peel 2007||Cephalon semicircular, width about 1.5 to 2.25 length; ocular lobe smoothly semicircular to slightly abaxially geniculated in posterior one-third; width (tr.) of interocular area slightly narrower than extraocular area; genal area of variable width. Thorax variable but moderately wide, about 0.5 to 0.6 of maximum sagittal length, widening slightly backward to about 6th segment, then tapering posteriorly; inner pleural regions slightly wider (tr.) than axis.|