See text Ellipsocephaloidea is a superfamily of trilobites that lived during the Cambrian period.

According to the Fossilworks database, Ellipsocephaloidea belongs to the order Redlichiida and includes several families, such as Agraulidae, Bigotinidae, Ellipsocephalidae, Estaingiidae, Palaeolenidae, and Yunnanocephalidae, although it is now thought the superfamily is within the Ptychopariida[1] Agraulidae is a family of trilobites within the superfamily Ellipsocephaloidea.

Members of this family are characterized by their large size and distinctive cephalic features.

Members of this family are characterized by their oval-shaped cephalon and distinctive thoracic segments.

Members of this family are characterized by their small size and distinctive cephalic features.