Neognathostomata Temporal range:
| |
---|---|
![]() | |
Echinocyamus pusillus | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Infraclass: | Irregularia |
Superorder: | Neognathostomata Smith, 1981 |
Orders | |
Cassiduloida |
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.