|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Agnostida - Agnostidae
It was assigned to Geragnostidae by Robison and Pantoja-Alor (1968); to Agnostida by Sepkoski (2002); and to Agnostidae by Whittington et al. (1997) 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.