From land to water
Names of the ancestors
The name of the ancestors are Pakicetidae, Ambulocetidae, Remingtonocetidae, Protocetidae, Basilosauridae, Dorudontidae.
The Protocetidae has lived more than 35 million years ago
The Protocetidae has evolved into the Basilosauridae and lived around the same time as the Dorudontidae. They both lived 34 million years ago
The Dorudontidae lived more than 34 million years ago.
How we know they are related
These creatures that lived millions of years ago all have a hip bone located inside them but even the ones that don't go on land have it too. Another way we know they are related is by looking at the spine, the spines are similar to the ones that animals have to walk on land.
This video will talk about the ancestors of the dolphin and will say a few facts about them.
(They talk about whales once because they are also related to dolphins)
(Stop at 1:50)
The Evolution of the Dolphin