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Blastoidea |
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Blastoidea [bla′stȯid·ē·ə] (paleontology) A class of extinct pelmatozoan echinoderms in the subphylum Crinozoa. 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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| When Baumiller looked at more than 4,000 fossils of the blastoid Heteroschisma, he found that 139 had conical or cylindrical holes. |
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