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Echinozoa

A Dictionary of Zoology | 1999 | 256 words | Copyright

Echinozoa (phylum Echinodermata) A subphylum whose members have radial symmetry of a globoid body without arms or projecting rays. It contains seven classes in the Palaeozoic, but only two of these (Echinoidea and Holothuroidea) survive to the present day.

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