Classification of Aves: 2 Subclasses (With Examples)
In this article we will discuss about the classification of Aves. Aves # Subclass Archaeornithes: 1. Includes all fossil birds from Jurassic, having toothed jaws, scaly limbs, long tail with tail feathers arranged in two parallel rows. 2. Pygostyle absent, free caudal vertebrate, free metacarpals. 3. Fore limbs with three digits ending in claws. 4. Ribs without uncinate process. Examples. [...]