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How did plant diversification influence insect evolution during the Permian Period?

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Permian paleogeography — Permian Period Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins near the end of the Permian Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.

During the Permian Period, the broad diversification of terrestrial plants served as a primary driver for the rapid evolution of insects. As plant life expanded into new habitats—shifting from marshy environments to progressively drier areas—insects followed, adapting to these changing surroundings.12

This expansion facilitated the development of highly specialized associations between insects and plants. As insects moved into these new niches, they underwent significant evolutionary changes, including the emergence of many new species and the diversification of mouthparts and limbs to accommodate new feeding methods. By the end of the period, this evolutionary pressure had resulted in the presence of at least 23 insect orders. This process highlights the critical role that plant community evolution plays in shaping the biodiversity of terrestrial ecosystems.13