Neognathostomata Temporal range: | |
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Echinocyamus pusillus | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Subclass: | Euechinoidea |
Infraclass: | Irregularia |
Superorder: | Neognathostomata Smith, 1981 |
Orders | |
The Neognathostomata are a superorder of sea urchins.
They are distinguished from other sea urchins by their irregular shape and a highly modified feeding lantern. The group includes the well known sand dollars, as well as some less familiar and extinct forms.