Atelostomata

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Atelostomata
Temporal range: Lower Jurassic–recent
Echinocardium cordatum.jpg
Echinocardium cordatum
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Superorder: Atelostomata
von Zittel, 1879
Orders

Cassiduloida
Holasteroida
Spatangoida

The Atelostomata are a superorder of sea urchins. They are distinguished from other sea urchins by their irregular shape and the absence of a feeding lantern. The group includes the well known heart urchins, as well as some less familiar and extinct forms.

List of orders[edit]

References[edit]