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The Mesozoic is the middle of the three eras since complex life evolved: the Paleozoic, the Mesozoic, and the Cenozoic. The era began in the wake of the Permian–Triassic extinction event , the largest mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event , another mass extinction whose victims included ...
At the end of the Cretaceous, the impact of a large body with the Earth may have been the punctuation mark at the end of a progressive decline in biodiversity during the Maastrichtian age. The result was the extinction of three-quarters of Earth's plant and animal species.
The Triassic is the first and shortest period of the Mesozoic Era and the seventh period of the Phanerozoic Eon. Both the start and end of the period are marked by major extinction events. [10] The Triassic Period is subdivided into three epochs: Early Triassic, Middle Triassic and Late Triassic.
Of all the phases Earth has been through, the Mesozoic Era stands out among the rest—even from off-world. A Study Says the Mesozoic Era Is the Key to Finding the Elusive Second Earth in Space ...
End-Triassic conodonts were represented by only a handful of species and had been progressively declining through the Middle and Late Triassic. [228] Yanliaomyzon from the Middle Jurassic of China represents the oldest post Paleozoic lamprey , and the oldest lamprey to have the toothed feeding apparatus and likely the three stage life cycle ...
Permian–Triassic boundary at Frazer Beach in New South Wales, with the End Permian extinction event located just above the coal layer [2]. Approximately 251.9 million years ago, the Permian–Triassic (P–T, P–Tr) extinction event (PTME; also known as the Late Permian extinction event, [3] the Latest Permian extinction event, [4] the End-Permian extinction event, [5] [6] and colloquially ...
Conodonts were a major vertebrate group which died out at the end of the Triassic. Fish did not suffer a mass extinction at the end of the Triassic. The Late Triassic in general did experience a gradual drop in actinopterygiian diversity after an evolutionary explosion in the Middle Triassic.
By the end of the Mesozoic era, the continents had rifted into nearly their present form. Laurasia became North America and Eurasia , while Gondwana split into South America , Africa , Australia , Antarctica and the Indian subcontinent , which collided with the Asian plate.