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