Echinozoa
| Echinozoa | |
|---|---|
 | |
| The melon sea urchin (Echinus melo) in northwest Sardinia | |
| Scientific classification | |
| Kingdom: | Animalia |
| Subkingdom: | Eumetazoa |
| Superphylum: | Deuterostomia |
| Phylum: | Echinodermata |
| Subphylum: | Echinozoa |
| Classes | |
† = Extinct | |
The Echinozoa are a subphylum of free-living echinoderms in which the body is essentially globoid with meridional symmetry. They lack arms, brachioles, or other appendages, and do not at any time exhibit pinnate structure.[1]