What era and what period occurred during 418 to 355 million years ago and describe what was present during this time frame?

The era from 418 to 355 million years ago was the Paleozoic Era that existed during the Middle of the Silurian Period and at the end of the Devonian Period. Jawed fish, Arachnids, Eurypterids, Land Plants, Devonian Forests, Sharks, Lung Fish, and Bony Fish were present during this time frame.