| Fibulariidae | |
|---|---|
 | |
| Echinocyamus pusillus | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Order: | Clypeasteroida |
| Family: | Fibulariidae |
Fibulariidae is a family of echinoderms belonging to the order Clypeasteroida. [1]
Genera: [1]
Sand dollars are species of flat, burrowing sea urchins belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are known as sea biscuits. Sand dollars can also be called "sand cakes" or "cake urchins".
The Neognathostomata are a superorder of sea urchins.
Fibularia is a genus of echinoderms belonging to the family Fibulariidae. The genus has almost a cosmopolitan distribution.
Echinocyamus pusillus, commonly known as the pea urchin or green urchin, is a species of sand dollar, a sea urchin in the family Fibulariidae, native to the northeastern Atlantic Ocean and the Mediterranean Sea. It buries itself in gravel or coarse sand at depths down to about 1,250 m (4,000 ft).
Echinocyamus is a genus of echinoderms belonging to the family Fibulariidae.
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