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amniote |
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amniote [′am·nē‚ōt] (zoology) An animal that develops an amnion during its embryonic stage; includes birds, reptiles, and mammals. 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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Our evolutionary roots--the
amniota-began a great divergence when a few amniotes crawled out of a
primordial sea and left their finned relatives behind. Along with its surprises, the tetrapod from Cheese Bay also offers
some confirmation for a 30-year-old theory about how amniotes arose. From the pattern of its skull, Smithson has placed the ancient
creature among the amniotes, an assemblage of reptiles, birds and
mammals whose embroys feature an amniotic membrane. |
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