Paleozoic Era Carboniferous Period

• 359-299mya• “Coal Age,” very well known for plant fossils

that make up the world’s major coal seams• “Age of the Amphibians,” including ancestors

of modern terrestrial vertebrates• Diversification of terrestrial and aquatic

arthropods• Evolution of amniotic egg in reptiles

Newly discovered “legless” amphibian- produces eggs that have yolk

Amphibian eggs