As a large animal family, dinosaurs ruled the world for over 100 million years. However, within the dinosaur family, not all different species coexisted. Some species only appeared in the Triassic period, some only in the Jurassic period, and some only in the Cretaceous period. Even for some "long-lived" groups, they simply crossed the boundaries of time; no single dinosaur could live from the Late Triassic period 140 million years ago to the end of the Cretaceous period 65 million years ago.
Tyrannosaurus Rex
In other words, throughout the history of the dinosaur family, they themselves underwent a continuous process of evolution and development. Some dinosaurs appeared first, and some appeared later; similarly, some dinosaurs went extinct first, and some went extinct later.
So, which dinosaurs were the last to go extinct? Clearly, those dinosaurs that lived until the very last moment before their mass extinction 65 million years ago are the last to go extinct. These included many species. Among them, herbivorous dinosaurs included Triceratops, Pachycephalosaurus, and Edmontosaurus; while carnivorous dinosaurs included Tyrannosaurus Rex and Serrated Direosaurus.
Triceratops
