Cyclopygoidea

Cyclopygoidea is a superfamily of trilobites in the order Asaphida, containing the families Cyclopygidae, Nileidae, Symphysurinidae, and Taihungshaniidae.^[1] Some subgroups such as the Cyclopygidae are thought to have lived in the water column in the deep sea, where as telephinids such as Carolinites inhabited epipelagic depths.^[2] Some members of the family Nileidae were moved outside of it.^[3] The first cyclopygoids were of the family Simphysurinidae such as Symphysurina in Furongian (late Cambrian) North America.^[4]

Cyclopygoidea Temporal range: Furongian–Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Asaphida
Superfamily:	†Cyclopygoidea