This time period took place 359 to 299 million years ago. 3 min read The Carboniferous period, part of the late Paleozoic era, takes its name from large underground coal deposits that date to it.

During the Carboniferous and Permian periods, there was only one group from the original 22,000 subspecies of trilobites that survived. The Proetida were smaller in numbers and were believed to be ...