1. Ambulocetus Fossils from the Eocene ~ 9.8 feet long
Probably ambush predators
Ate larger fish and aquatic
tetrapods
Probably fully aquatic
Slow swimmer

2. Ambulocetus
Fossils found in probable estuarine sediments

3. Thewissen et al. (2009)

4. Newsome et al. (2010)

5. Ambulocetus
Pakicetus

7. 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

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