Figure 2. Animation of air-breathing in basal tetrapods with weak lungs inflated by contraction and expansion of the throat sac, rather than gill irrigation powered by the reduced here buccal bones.
Figure 2. Animation of air-breathing in basal tetrapods with weak lungs inflated by contraction and expansion of the throat sac, rather than gill irrigation powered by the reduced here buccal bones.
The Pterosaur Heresies 
