 Other vertebrates present at the time of "Tenontosaurus" included the amphibian "Albanerpeton arthridion", the reptiles "Atokasaurus metarsiodon" and "Ptilotodon wilsoni", the crurotarsan reptile "Bernissartia", the cartilaginous fish "Hybodus buderi" and "Lissodus anitae", the ray-finned fish "Gyronchus dumblei", the crocodilian "Goniopholis", and the turtles "Glyptops" and "Naomichelys".Possible indeterminate bird remains are also known from the Antlers Formation.The fossil evidence suggests that the gar "Lepisosteus" was the most common vertebrate in this region.