plesiosaurs Definition

plesiosaurus, necked, ichthyosaurs, theropod dinosaur, ostracods, iguanodon, crinoids, auks, psittacosaurus, robustus, baleen whale, paranthropus, theropod, isopods, trilobites, mammals, protoceratops, monotremes, sauropods, mosasaur, conodonts, toothed whale, peccary, placentals, utahraptor, crocodilians, genus australopithecus, flatfishes, ammonites, tyrannosaurs, smilodon, edmontosaurus, ocean sunfish, brachiopods, caecilians, dinosaurs, archeopteryx, insectivores, faunas, platypuses, hadrosaur, gastropod, allosaurus, barnacle goose, stegosaurs, jawless fish, stickleback, sauropod dinosaur, pterosaur, eoraptor, echinoderms, coelophysis, arapaima, forelimbs, habilis, sifaka, pteropods, apatosaurus, devonian period, permian period, woolly rhinoceros, stegodon, megafauna, homo habilis, bryozoans, placoderms, archaeopteryx, deinonychus, compsognathus, phalaropes, bony fish, amphipods, spiny anteater, aurochs, tadpole shrimp, australopithecus africanus, diatoms, horned dinosaur, ankylosaur, coprolite, damselfish, thylacine, architeuthis, ankylosaurus, australopithecines, skink, aquatic mammal, coelacanths, protozoans, scutes, arthropods, ivory gull, chordates, diplodocus, limpets, africanus, squids, brachiosaurus, butterflyfish, narwhal,