-
55 BCE
Artriodictyls
First form of dolphins, but on land -
50 BCE
Mesonychidae
Spent more time looking for food, both in land and in water -
45 BCE
Protocetidae
Already in water -
40 BCE
Dorundontinae
New form of Protocetidae -
25 BCE
Delphie
Start of the current group of dolphins
