Gigantopterids (Gigantopteridales)'s the name given to fossils of a group of plants existing in the Late Permian, until some 250 million years ago. Gigantopterids were among the most advanced land plants of the Paleozoic and disappeared soon after the massive Permian–Triassic extinction event 251.4 million years ago. Though some lineages of these plants managed to persist initially, they either disappeared entirely or adapted radically, evolving into undetermined descendants, as surviving… (More on Gigantopterid)