|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Aulacopleurida - Hystricuridae
It was synonymized subjectively with Hillyardina by Adrain et al. (2003) and Jell and Adrain (2003).
It was assigned to Ptychopariida by Sepkoski (2002); and to Hillyardininae by Adrain and Westrop (2007).
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.