|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Trilobita - Lichida - Lichidae
It was recombined as Hemiarges ptyonurus by Whittington (1961); it was recombined as Richterarges ptyonurus by Adrain (1994).
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.