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Unformatted text preview: b. Tiktaalik Roseae - ~375MYA – Canada – “fishapod” –represents a transitional group between early fish and the amphibians and other tetropods c. Habitat drying up, dwindling food d. Fleshy fins > legs e. Easier to meet oxygen demands f. Not totally terrestrial g. Lungs, skin, mouth lining 6. Reptilia a. Cotylosaurs, diverged 300MYA b. Dry, scaly skin, legs under body c. Internal fertilization d. Fertilized egg develops in female e. Amniote egg f. More convoluted lungs g. 3 chambered heart – oxygenated and deoxygenated lung 7. Aves – birds a. Air theory – smale arboreal reptile b. Ground theory – bipedal dinosaur c. Theropods – talons to catch its prey...
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- Fall '07
- scaly skin, swim bladder, Tetrapod, smale arboreal reptile, Large fresh water