1. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes

2. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- gill arches

3. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- gill arches
- evolved to jaws

4. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- gill arches
- evolved to jaws
- increase feeding

5. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- gill arches
- evolved to jaws
- increase feeding
- priority on
locomotion

6. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- gill arches
- evolved to jaws
- increase feeding
- priority on
locomotion
- Cephalization

7. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- Placoderms (extinct – survived to Permian)
dominant predators
paired appendages for swimming

9. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- Placoderms (extinct – survived to Permian)
- Cartilaginous fish (Class: Chondrichthyes)
also efficient paired fins
- sharks
- skates, rays
- ratfish

10. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- Placoderms (extinct – survived to Permian)
- Cartilaginous fish (Class: Chondrichthyes)
- Bony Fish (Class: Osteichthyes)

11. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- Placoderms (extinct – survived to Permian)
- Cartilaginous fish (Class: Chondrichthyes)
- Bony Fish (Class: Osteichthyes)
- light bone skeleton

12. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- Placoderms (extinct – survived to Permian)
- Cartilaginous fish (Class: Chondrichthyes)
- Bony Fish (Class: Osteichthyes)
- light bone skeleton
- air sac for respiration

13. II. Animal Diversity
3. Vertebrata
c. Jawed Fishes
- Placoderms (extinct – survived to Permian)
- Cartilaginous fish (Class: Chondrichthyes)
- Bony Fish (Class: Osteichthyes)
- light bone skeleton
- air sac for respiration
- in Ray-finned: swim bladder
(light, buoyant, fast)

14. - Bony Fish (Class: Osteichthyes)
- light bone skeleton
- air sac for respiration
- in Ray-finned: swim bladder
(light, buoyant, fast)
- in Lobe-finned and lungfish:
evolved jointed fins…
could support weight
on land, and breath with
air sac. (Devonian – 400my

15. II. Animal Diversity
3. Vertebrata
d. Amphibians

16. II. Animal Diversity
3. Vertebrata
d. Amphibians
- Evolved in Devonian (375 mya) - Lungfish
- fed on abundant terrestrial Arthropods

17. Ichthyostegids

18. II. Animal Diversity
3. Vertebrata
d. Amphibians
- Caecilians, Frogs and Toads, Salamanders

19. II. Animal Diversity
3. Vertebrata
d. Amphibians
- Caecilians, Frogs and Toads, Salamanders
- small lungs, respiratory skin must stay moist

20. II. Animal Diversity
3. Vertebrata
d. Amphibians
- Caecilians, Frogs and Toads, Salamanders
- small lungs, respiratory skin must stay moist
- eggs must stay moist

21. II. Animal Diversity
3. Vertebrata
e. Reptiles – evolved in Carboniferous (325 mya)

22. II. Animal Diversity
3. Vertebrata
e. Reptiles
- amniotic egg with shell

23. II. Animal Diversity
3. Vertebrata
e. Reptiles
- amniotic egg with shell
- kidney to produce concentrated urine

24. II. Animal Diversity
3. Vertebrata
e. Reptiles
- amniotic egg with shell
- kidney to produce concentrated urine
- scales to reduce water loss from skin

25. II. Animal Diversity
3. Vertebrata
f. Birds: evolved over 200 mya ago

26. II. Animal Diversity
3. Vertebrata
f. Birds
- feathers – homeothermy and flight

27. II. Animal Diversity
3. Vertebrata
f. Birds
- feathers – homeothermy and flight
- “one way” lung – more efficient