G is for "Gigantosaurus" Gigantosaurus means giant lizard. Gigantosaurus was the largest carnivore. He roamed Argentina during the late Cretaceous Period. Check him out below! He sure is gigantic! Gigantosaurus Click the button to download your free Gigantosaurus Poster! Download your Poster Free Gigantosaurus Coloring Page Gigantosaurus Click below to download a free Gigantosaurus coloring page that you can color yourself and keep! Download your Coloring Page