1. Kutchicetus Probably smallest Eocene cetacean Extremely narrow snout
By Momotarou Own work, CC BY-SA 3.0,
Probably smallest Eocene cetacean
Extremely narrow snout
Strong tail
Very short limbs

3. Pakicetus
Kutchicetus
Durodon
Thewissen et al. (2009)

5. Rodhocetus Fossils from the Eocene ~ 8 feet long
Short limbs with long hands and
feet
Hands and feet were probably
webbed
Probably swam with alternating
strokes of hind feet
Probably insulated with fur

7. Durodon Fossils from the Eocene ~ 16 feet long Forelimbs are flippers
Tiny hindlimbs
Possessed a tailfluke
Fed on small fish and mussels
Lived in warm seas around the world

8. Thewissen et al. (2009)

10. Femur
Pelvis
Fibula
Tarsals
Tibia
Metatarsals
Phalanges

11. Spotted Dolphin Embryo
Thewissen et al. (2009)

12. Thewissen et al. (2009)

13. 5 2 4 1 3 Durodon Ambulocetus Rodhocetus Pakicetus Kutchicetus
Thewissen et al. (2009)

15. What’s the big deal about being an aquatic mammal?