Order Echinoneoida Clark 1925 (sea urchin)
PaleoDB taxon number: 168457
Alternative spellings: Echinoneina, Echinoneoina
Full reference: H. L. Clark. 1925. A Catalogue of the Recent Sea-Urchins (Echinoidea) in the Collection of the British Museum (Natural History). Oxford University Press, London 1-250
Parent taxon: Irregularia according to A. Kroh and A. B. Smith 2010
Sister taxa: Atelostomata, Holectypoida, Microstomata, Pygasteridae
Subtaxa: Cluniaster, Conulidea, Echinoneidae, Mattsechinus
Ecology: epifaunal grazer-deposit feeder