Here is a very nice interactive time line rich in content from National Geographic. It's titled "Sea Monsters: A Prehistoric Adventure". It allows you to look at different parts of the Earth during different eras. After you've reached the end of the time line, there is a part where you can look at species by continent.
Here are a few images I found as well...
This may not pertain exactly to the assignment, but I think it's in the ballpark.

But these do...


Here is some content I have found on the web for this project...
Modernism Time LineComparison