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The Devonian was a period in Earth's history. During that point in time, a group of animals called amphibians walked onto dry land but were still bound to the water's edge. Meanwhile, in the seas, fish began to dominate.
Environments and ecologyEdit
At the beginning of the Devonian, there was still little life on the land. However, over the next few million years, the landscape was eventually covered in primitive forests, which mainly consisted of the first tree-like plant, Archaeopteris. These plants grew close to rivers and estuaries.
Animal life in the early Devonian mainly consisted of small arthropods like centipedes and trigonotarbids - which were distant relatives of modern spiders and arachnids. However, over the following millions of years, some fish evolved in quadrupedal, land-dwelling amphibians, such as Hynerpeton.
In the water, the arthropods were out-competed by their ancient foes, fish. The Devonian saw the evolution of many different types of fish. The first sharks, like the bizarre Stethacanthus appeared and were ferocious predators, which their sleek design and deadly weapons. However, not even the first sharks could hold a candle to the giant placoderm fish Dunkleosteus, which terrorized the open oceans. Meanwhile, in the shallow coastal waters, bony fish like the predatory fish Hyneria evolved.
101. Dangerous SeasEdit
After accomplishing his goal in the Devonian, Nigel traveled forwards in time to the Eocene.
101. Water DwellersEdit
The * means that the animal did NOT really live in this period.
Behind the scenesEdit
List of appearancesEdit
Notes and referencesEdit