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All of the Trilobites, Pelycosaurs, Gorgonopsians, Dimetrodon, Edaphosaurus, Pariesaurs, most of the ammonites, amphibians, and jawless fish, plus many more.

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Why did trilobites become extinct?

The trilobites went extinct during the mass extinction at the end of the Permian period.


The largest extinction the world has ever known occurred at the end of which period?

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.


Were trilobites alive in the permian period?

Yes, trilobites were still present in the Permian, but at much lower numbers and diversity. Only the Order Proetida remained. The Permian ended with a mass extinction, and among the many groups which went extinct at the end of the Permian were the last trilobites. See Related Links below.


When did the dimetrodon went extinct?

the dimetrodon went extinct in the Permian Mass Extiction Event in 250 million years ago


What were some animal extinctions in the Permian period?

Many different organisms went extinct at the end of the Permian. Some of them include trilobites, conodonts, sea scorpions, and blastoids. Many other groups were nearly wiped out, with only a few species surviving. Brachiopods were decimated by the extinction event and never fully recovered as clams became more dominant.


What period in which the last ammonites became extinct?

Ammonites went extinct at the end of the Cretaceous Period.


Why the huayangosaurus went extinct?

huayangosaurus went extinct in the K/T Mass Extinction in 65 million years ago with all Dinosaurs Went Extinct


What rhinos have gone extinct?

Extinct is an incomparative word. Things are either extinct or not, you cannot have degrees or levels of extinction. At present the rhinoceros is greatly endangered and may become extinct.


When did the dinosaurs became extingt?

Dinosaurs became extinct around 65 million years ago during the Cretaceous-Paleogene extinction event. It is believed that a combination of climate change, asteroid impact, and volcanic activity contributed to their extinction.


How does the background rate of extinction differ from mass extinctions?

The background rate of extinction is much smaller than those that occur during a mass extinction. For example, carnotaurus sastrei went extinct during the mid-Cretaceous, when only a handful of dinosaurs went extinct. On the other hand, 65 million years ago, all dinosaurs went extinct during the K/T mass extinction event.


What species of lemurs went extinct?

one major species was the extinct lemur. they've been extinct for minutes.


Is are there any extinct species of bisons?

yes there are types of bison that went extinct.