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Bilateria |
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Bilateria [‚bī·lə′tir·ē·ə] (zoology) A major division of the animal kingdom embracing all forms with bilateral symmetry. 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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| They tentatively identify these specimens as bilaterian animals--creatures more complex than sponges or jellyfish. |
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