Neognathae

Neognaths (Neognathae) are birds within the subclass Neornithes of the class Aves. The Neognathae include virtually all living birds; exceptions being their sister taxon (Palaeognathae), which contains the tinamous and the flightless ratites. There are nearly 10,000 species of neognaths. Since the late Cretaceous period, from which the earliest fo...
Found on http://en.wikipedia.org/wiki/Neognathae

Neognathae

The Neognathae meaning new jaw) are birds . They include most flying birds plus swimming and diving birds like penguins. Neognaths evolved during the Late Cretaceous period , about 70 million years ago. They are grouped together taxonomically based on palate (jaw) structure. (Compare to Palaeognathae .)
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