 The paleoenvironment of the Antlers Formation consisted of tropical or sub-tropical forests, floodplains, river deltas, coastal swamps, bayous and lagoons, probably similar to that of modern-day Louisiana.In the Antlers Formation in what is now Oklahoma, "Tenontosaurus" and "Deinonychus" shared their paleoenvironment with other dinosaurs, such as the sauropods "Astrodon" (Pleurocoelus) and "Sauroposeidon proteles", and the carnosaur "Acrocanthosaurus atokensis", which was likely the apex predator in this region.The most common dinosaur in the paleoenvironment preserved in this formation is "Tenontosaurus".