Palaeognathae

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Palaeognathae

the more primitive of the two major groups of living birds, containing the RATITES and the tinamous. In contrast with the NEOGNATHAE, the jaw structure contains a large prevomer bone that contacts the pterygoid bones.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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