I recently worked up a little geologic scale and time line and plugged in most of our crustacean cast. I've put it at the bottom of every animal page here on our site, so you can expand it.
It's truly remarkable to see what a massive span of time we know of in the fossil record, from the earliest trilobites, to the toothy leviathans like Livyatan and Megalodon who were around in what seems like practically yesterday when you look at this time line. Enjoy!
