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Holasteroida |
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Holasteroida [‚häl·ə·stə′rȯid·ə]
(invertebrate zoology) An order of exocyclic Euechinoidea in which the apical system is elongated along the anteroposterior axis and teeth occur only in juvenile stages. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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