Echinozoa

Echinozoa
The melon sea urchin (Echinus melo) in northwest Sardinia
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Subphylum: Echinozoa
Classes
Echinoidea
Holothuroidea
Ophiocistioidea
Helicoplacoidea
?Arkarua

† = 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.[1]

See also

List of echinodermata orders.

References

This article is issued from Wikipedia - version of the 11/28/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.