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

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II. Animal Diversity 3. Vertebrata c. Jawed Fishes

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

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

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

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

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

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

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

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

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

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

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)

- 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

II. Animal Diversity 3. Vertebrata d. Amphibians

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

Ichthyostegids

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

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

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

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

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

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

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

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

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

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

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