1. Dolphin Evolution

2. What is evolution
 The biological model of the history of life on earth
 Scientific theory

3. How is it tracked
 Phylogenic trees

4. What are dolphins ?
 Delphinidae
 Mammals
 Completetly aquatic
 Ecolocation

7. Indohyus
 Eariest known sister group
 Whale like features

8. Pakicetidae
 Early Eocine 50 million
 Caracteristics similar to whales
 Freshwater

9. Ambulocetidae
 49 million years ago
 Fresh/salt water
 Hunted in the water
 Mandibular foramen

10. Remingtonocetidae
 49 to 43 million years ago
 Did not ingest fresh water
 Swim with tails

11. Protocetidae
 Diverse group
 More aquatic (some could walk some could not)
 Nostril shifting
 Audio reception change
 Pelvis still conected to spine

12. Basilosauridae
and Dorudontinae
 Could not live on land
 Ate fish
 Lacked melon – new sinuses
 Mandibular foramen

13. Odontocetes
 Echolocation
 Melons
 Social behaviours
 One bowhole 75 species

14. Mysticetes
 Baleen
 Large amounts of food
 Increment in size
 14 species

15. Modern evolution
 Culture
 Social networks
 Environmental factors