Echinozoa Temporal range:
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The melon sea urchin (Echinus melo) in northwest Sardinia | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Subphylum: | Echinozoa |
Classes | |
† = Extinct |
Echinozoa is a subphylum of free-living echinoderms in which the body is or originally was a modified globe with meridional symmetry. Echinozoans lack arms, brachioles, or other appendages, and do not at any time exhibit pinnate structure.[1] Their two extant classes are the sea urchins and the sea cucumbers.
See also
References