From Wikipedia, the free encyclopedia
|The melon sea urchin (Echinus melo) in northwest Sardinia|
† = Extinct
Echinozoa is a subphylum of free-living echinoderms in which the body is essentially globoid with meridional symmetry. Echinozoans lack arms, brachioles, or other appendages, and do not at any time exhibit pinnate structure.
|This echinoderm-related article is a stub. You can help Wikipedia by expanding it.|