Ptychoparioidea

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Superphylum: Ecdysozoa
Phylum: Arthropoda
Subphylum: †Trilobitomorpha
Classis: Trilobita
Ordo: Ptychopariida
Subordo: Ptychopariina
Superfamilia: Ptychoparioidea
Familiae: Acrocephalitidae - Alokistocaridae - Antagmidae - Asaphiscidae - Atopidae - Bolaspididae - Cedariidae - Changshaniidae - Conocoryphidae - Conokephalinidae - Crepicephalidae - Diceratocephalidae - Elviniidae - Eulomidae - Holocephalinidae - Ignotogregatidae - Inouyiidae - Isocolidae - Kingstoniidae - Liostracinidae - Llanoaspididae - Lonchocephalidae - Lorenzellidae - Mapaniidae - Marjumiidae - Menomoniidae - Nepeidae - Norwoodiidae - Papyriaspididae - Phylacteridae - Proasaphiscidae - Ptychopariidae - Shumardiidae - Solenopleuridae - Tricrepicephalidae - Utiidae - Wuaniidae

Stratigraphic Extension

Lower Cambrian --> Middle Ordovician