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Platyasterida |
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Platyasterida [¦plad·ē·a′ster·ə·də] (invertebrate zoology) An order of Asteroidea in which traces of metapinnules persist, the ossicles of the arm skeleton being arranged in two growth gradient systems. 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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