all of them small

approximately 49-48 million years ago

in the Pisco basin

Tyrannosaurus rex stood upright on its hind legs and had a long

Zuul crurivastator Monolophosaurus all of them smallZuul crurivastator is a herbivorous ankylosaurine dinosaur from the Campanian stage of the Late Cretaceous (approximately 76. 275. 2 million years ago) that has provided valuable morphological and paleoecological data thanks to an exceptionally complete specimen recently described. It was found in the Judith River Formation in northern Montana (USA), and its extraordinary preservation includes a complete skull, caudal club, osteoderms in situ, keratin