Echinozoa

Echinozoa Temporal range: Early Ordovician–Present PreꞒ Ꞓ O S D C P T J K Pg N
A sea cucumber ( Apostichopus californicus ) among sea urchins ( Strongylocentrotus purpuratus and Mesocentrotus franciscanus ) in California, United States
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Subphylum:	Echinozoa
Classes
Echinoidea (sea urchins) Holothuroidea (sea cucumbers) †Ophiocistioidea † = 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

• List of echinodermata orders

References

1. "Answers - the Most Trusted Place for Answering Life's Questions". Answers.com .