EEB267H1 Lecture 18: The Archosauria (Ruline Lizards): Lectures 18 and 19
29 May 2017
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Eeb267 page 1 opening to allow an air sac to come up out of the nose = pneumatic skull (light) closes over in extant crocodiles during development. Eeb267 page 2 descended from fully terrestrial ancestors not set up for swallowing salt water, doesn"t stay in ocean for very long semi-aquatic, freshwater. Eeb267 page 3 (choana) look like a log eyes sit up high too. External nostrils moved forward, internal nostril moved backward (like us, not unique to crocodiles but diff from most reptiles) All amniotes have the primary palate, which separates the nasal cavity from the rest of the mouth. Eeb267 page 5 the water will not go down into its lungs. Bigger crocs will lunge forward propel themselves with their tail hints of kin groups never aggression over the food forming in area of river that is narrowest and block the fish coming to spawn.
