"According to the fossil record, this group became the dominant group of insects on Earth in the Permian, 300 million years ago to 250 million years ago," Dietrich said. "But at the end of the Permian they underwent a mass extinction, which was worse than the one that killed off the dinosaurs a couple hundred million years later."
Eventually, the Hemiptera, along with the orders representing thrips and lice, were eclipsed by another group of insects, the Holometabola, which undergo complete metamorphosis and are even more diverse. Holometabola include butterflies, moths, ants, bees, flies and beetles.
"According to the fossil record, this group became the dominant group of insects on Earth in the Permian, 300 million years ago to 250 million years ago," Dietrich said. "But at the end of the Permian they underwent a mass extinction, which was worse than the one that killed off the dinosaurs a couple hundred million years later."
Eventually, the Hemiptera, along with the orders representing thrips and lice, were eclipsed by another group of insects, the Holometabola, which undergo complete metamorphosis and are even more diverse. Holometabola include butterflies, moths, ants, bees, flies and beetles.
https://phys.org/news/2018-11-effort-major-insect-tree-life.html#jCp