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Archaeornithes

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Archaeornithes [‚ärk·ē′ȯr·nə‚thēz]
(paleontology)
A subclass of Upper Jurassic birds comprising the oldest fossil birds.


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There are also two subclasses: Archaeornithes, which consists entirely of extinct birds (including the archaeopteryx); and Neornithes, which includes three superorders as follow: ?
 
 
 
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