|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Asaphida - Cyclopygidae
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.
|R. A. Fortey 1981||The diagnosis given in the Treatise (Richter & Richter in Moore, 1959) is extended to include cyclopygids with seven thoracic segments, and relatively large fixigenal areas, with concomitantly smaller eyes.|