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It ended from mass extinction.
The largest extinction event known is the Permian-Triassic Extinction Event, 250 million years ago. It is nicknamed "The Great Dying" in reference to how 96% of all known marine animals and 70% of all known terrestrial vertebrates at the time went extinct due to climatic changes because of volcanic eruptions and the formation of Pangaea.
Yes, the Cambrian Period was before the Mesozoic Era
The Devonian Period is a part of the Paleozoic Era, which covers the time from 541 to 252.17 million years ago. It began with the Cambrian explosion, in which most phyla of life began, and ended with the mass extinction called the Permian-Triassic extinction event.
Trilobites originated during the Cambrian era, flourished through the Paleozoic era, declined during the Devonian era, and finally became extinct in the Permean mass extinction event. In total there were live trilobites on the earth for about 290 million years.
Trilobites, amphibians, and many other species of animals became extinct in the Permian-Triassic extinction. This event happened over 250 million years ago.
Cambrian Explosion
The start of the Paleozoic Era was marked by a huge diversification of life known as the Cambrian Explosion. Many genre of life emerged during the Cambrian Period. Although plants and animals were around in the Pre-Cambrian it was not until after the extinction event that immediately proceeded the Paleozoic that many advanced forms of life evolved such as multi-celled plants and advanced animals such as the arthropods.
The only plant from the Cambrian period is algae.
the mass extinction
The Ediacarian fauna are from the Cambrian Explosion. The Cambrian Explosion occurred in the Cambrian period. The Cambrian period was part of the Paleozoic era.
A major extinction event.