The Devonian Period, 410 to 360 million years ago, is best known as the "age of fishes". While it's true that fish experienced an explosive radiation at this time, it also marked a major change in the terrestrial ecosystem as life began to move wholesale from the water to the land. This period saw the widespread colonization of the land by vascular plants and the formation of the first forests, while beneath their spreading branches the newly evolved tetrapod animals took their first tentative steps out of the water.
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- Devonian Times Educational site covering the early evolution of tetrapods by focusing on the Late Devonian Red Hill locality in Pennsylvania and its flora and fauna.
- The Devonian An overview of the period from the UC Berkeley Museum of Paleontology.
- Devonian Geography Description and maps of the continents as they existed at the time.
- First Find of Edrioasteroids (Echinodermata) in the Bohemian Devonian Provides descriptions and photographs of three specimens of Rhenopyrgus sp. from the Dvorce-Prokop Limestone.