Ellipsocephaloidea

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: Ellipsocephaloidea
Familiae: Agraulidae - Aldonaiidae - Bigotinidae - Chengkouiidae - Ellipsocephalidae - Estaingiidae - Palaeolenidae - Yunnanocephalidae

Stratigraphic Extension

Lower Cambrian --> Middle Ordovician