During the Lower Cretaceous, new dinosaurs appeared. Sauropods were still present, but they were not as diverse as they were in the Jurassic. Theropods from the early Cretaceous of North America include dromaeosaurs such as "Deinonychus" and "Utahraptor", "Acrocanthosaurus", and "Microvenator". Sauropods included "Astrodon", "Pleurocoelus", and "Sauroposeidon". Ornithischians were more diverse than they were in the Jurassic Period. "Tenontosaurus", "Hypsilophodon", "Iguanodon", "Protohadros", and "Eolambia" are some of the ornithopods that lived then. Ankylosaurs replaced their stegosaur cousins in the Cretaceous. Ankylosaurs from the early Cretaceous of North America include "Sauropelta" and "Gastonia". Therizinosaurs such as "Falcarius" are also known from the early Cretaceous of North America.