 In the arid Little Sheep Mudstone Member, "Tenontosaurus" is the only herbivorous dinosaur, and it shared its environment with the common predator "Deinonychus" as well as an indeterminate species of allosauroid theropod and goniopholid crocodile.After the major climate shift at the beginning of the Himes Member in the mid-Albian age, several more dinosaurs entered the region, including the less common ornithopod "Zephyrosaurus", the oviraptorosaur "Microvenator", and an indeterminate species of titanosauriform sauropod and ornithomimid.The ecological community in the tropical stage also included the small mammal "Gobiconodon", turtles such as "Glyptops", and species of lungfish".