an important part of the Cloverly herbivore guild, the most abundant herbivorous dinosaur of the time was the large ornithopod Tenontosaurus. The smaller ornithopod Zephyrosaurus, rare titanosaur sauropods, and an unknown type of ornithomimosaur also lived alongside Sauropelta. The dromaeosaurid theropod Deinonychus fed upon some of these herbivores, and the sheer number of Deinonychus teeth scattered throughout the formation are a testament to its abundance. Microvenator, a small basal oviraptorosaur, hunted smaller prey, while the apex predators of the Cloverly was the large carcharodontosaurid theropod Acrocanthosaurus. Lungfish, triconodont mammals, and several species of turtles lived in the Cloverly, while crocodilians prowled the rivers, lakes, and swamps, providing evidence of a year-round warm climate. The Late Jurassic fauna dominated by allosauroids, stegosaurs, and many varieties of huge sauropods gave way by Cloverly times to an Early Cretaceous fauna in which dromaeosaurs, ornithopods, and nodosaurs like Sauropelta were predominant. After the Cloverly ended, a large wave of Asian animals, including tyrannosaurids, ceratopsians, and ankylosaurids would disperse into western North America, forming the mixed fauna seen throughout the Late Cretaceous. See also Timeline of ankylosaur research References External links Entries in Online Collections Database at the American Museum of Natural History: AMNH 3032 (pictures of assorted bones included) AMNH 3035 (pictures of skull and cervical armor included) AMNH 3036 Entry for Nodosauridae on Tree of Life, including modern restoration of Sauropelta armor Nodosaurids Early Cretaceous dinosaurs of North America Fossil taxa described in 1970 Taxa named by John Ostrom Cloverly fauna Paleontology in Wyoming Paleontology in Montana Ornithischian genera