|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Trilobita - Ptychopariida - Shumardiidae
It was assigned to Ptychopariida by Sepkoski (2002); and to Shumardiidae by Harrington and Leanza (1957), Robison and Pantoja-Alor (1968), Hoel (1999), Fortey and Droser (1999) and Jell and Adrain (2003).
Is something missing? Join the Paleobiology Database and enter the data
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.