Archaeopteryx(redirected from Archaeopterix)
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Archaeopteryxthe earliest known fossil bird (genus Archaeopteryx) found in the Jurassic period about 140 million years BP. The bird is characterized by the presence of teeth in the jaws, claws on the wing and a tail containing vertebrae.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005