|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Asaphida - Asaphidae
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.
|M. Ghobadi Pour et al. 2011||Cranidium of about equal length and width, with broadly and evenly rounded anterior margin; preglabellar field smooth, with very weakly expressed longitudinal median ridge; pygidium about 70% as long as wide, with axis occupying 20% of pygidial width and 75% of maximum pygidial length, and terminating with a short postaxial ridge; axial furrows are shallow and wide, almost straight; 12 well-defined axial rings; pleural field flattened, with six pairs of pleural ribs which do not reach border.|