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Helicoplacoidea |
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Helicoplacoidea [‚hel·ə·kō·plə′kȯid·ē·ə] (paleontology) A class of free-living, spindle- or pear-shaped, plated echinozoans known only from the Lower Cambrian of California. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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