| Neognathostomata Temporal range:
| |
|---|---|
| |
| 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.
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