|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Agnostida - Diplagnostidae
It was reranked as Pseudagnostus (Sulcatagnostus) by Lu and Lin (1989).
It was assigned to Pseudagnostus by Lu and Lin (1989); and to Agnostida by Sepkoski (2002).
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.