The Morrison Formation records an environment and time dominated by gigantic sauropod dinosaurs such as "Camarasaurus", "Diplodocus", "Apatosaurus" and "Brachiosaurus". Dinosaurs that lived alongside "Barosaurus" included the herbivorous ornithischians "Camptosaurus", "Dryosaurus", "Stegosaurus" and "Othnielosaurus". Predators in this paleoenvironment included the theropods "Saurophaganax", "Torvosaurus", "Ceratosaurus", "Marshosaurus", "Stokesosaurus", "Ornitholestes" and "Allosaurus" accounted for 70 to 75% of theropod specimens and was at the top trophic level of the Morrison food web. Other vertebrates that shared this paleoenvironment included ray-finned fishes, frogs, salamanders, turtles, sphenodonts, lizards, terrestrial and aquatic crocodylomorphans, and several species of pterosaur. Early mammals were present such as docodonts, multituberculates, symmetrodonts, and triconodonts. The flora of the period has been revealed by fossils of green algae, fungi, mosses, horsetails, cycads, ginkgoes, and several families of conifers. Vegetation varied from river-lining forests of tree ferns, and ferns (gallery forests), to fern savannas with occasional trees such as the "Araucaria"-like conifer "Brachyphyllum".