There were also the newly evolved sharks, which were represented by Stethacanthus, whose sleek shape and sharp teeth made them formidable hunters. The fish had come of age with the evolution of a powerful jaw armed with sharp teeth, which enabled them to tackle active prey they very quickly increased in both variety and size. It was during the Devonian that the first fish crawled out of the water onto the land to transform into air breathing, four legged amphibians.īack in the seas meanwhile, there were now two types of swift and terrifying predator. At the beginning of the Devonian life on land was still sparse, but within just a few million years, pioneering plants such as Cooksonia had transformed into the first true forests dominated by a tree like plant called Archaeopteris, which grew in vast numbers alongside rivers and estuaries.Īnimal communities on land were dominated by millipedes and predatory animals such as the trigonotarbids, who were distant relatives of modern spiders. ![]() The Devonian Period saw big changes both on land and in the seas. Devonian Period: 417-354 Million Years Ago
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