|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Corynexochida - Zacanthoididae
It was assigned to Paradoxidae by Walcott (1908); to Corynexochida by Sepkoski (2002); and to Zacanthoididae by Eddy and McCollum (1998) and Jell and Adrain (2003).
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.