1. Class Reptilia amniotic eggs with a thick protective shell powerful jaws and limbs internal fertilization tough, dry, scaly skin 3 chambered heart (4 in crocodilians) efficient lungs

2. Amniotic Egg

3. Evolution of the Legs

4. The Origin and Adaptive Radiation of the Reptilian Groups Evolution of the Cranium

5. The Origin and Adaptive Radiation of the Reptilian Groups The Anapsids

6. The Origin and Adaptive Radiation of the Reptilian Groups The Diapsids

7. The Origin and Adaptive Radiation of the Reptilian Groups The Synapsids

8. Subclass Anapsida Order Testudines: The Turtles dorsal carapace, ventral plastron lack a diaphragm poor hearing & vocalization lack teeth (sharp beak)

9. Reproduction bury eggs on land sex is determined by development temperature (cold  males)

10. kinetic skull Subclass Diapsida Order Squamata Lizards, Snakes, & Worm Lizards

11. Lizards moveable eyelids external ear skin lacks glands Worm Lizards entirely limbless numerous vertebrae no moveable eyelids Jacobson’s organs Snakes burrowers lack external limbs ears & eyes hidden under skin

12. Lizard Behavioral Adaptations

13. Jacobson’s Organs

14. Snake Reproduction oviparous ovoviviparous viviparous Snake Venom neurotoxin hemotoxin Hemotoxin video

16. The Tuatara Order Sphenodonta represents one of the slowest rates of evolution known among vertebrates

17. Features in Common with Fossils diapsid skull “third” eye

18. Order Crocodilia The Crocodiles & Alligators like Tuatara, remained relatively unchanged over 200 m.y. bury eggs on land (cold  females) with birds, only surviving representatives of archosaurians

19. Crocodilian Circulation