pachycephalosaurus Definition

pachycephalosaur, ankylosaurus, iguanodon, diplodocus, apatosaurus, allosaurus, theropod, triceratops, homo habilis, tyrannosaur, smilodon, brachiosaurus, trilobite, stegosaurus, deinonychus, hadrosaur, homo erectus, dimetrodon, ornithopod, ankylosaur, robustus, crinoids, africanus, braincase, utahraptor, theropod dinosaur, australopithecines, camarasaurus, ichthyosaurs, psittacosaurus, giganteus, placoderms, annelids, protoceratops, plesiosaurs, aurochs, archosaur, brachiopod, australopithecus africanus, pteranodon, sifaka, paranthropus, mammuthus, carcharias, conodonts, maned wolf, laurasia, insectivore, gracile, woolly rhinoceros, peccary, cichlid, devonian period, placentals, bufo, jawless fish, stegodon, borealis, sauropod dinosaur, phalaropes, coelophysis, radula, canid, baleen whale, compsognathus, auklet, auks, chordates, gladius, saddleback, mandrill, chiroptera, pelage, dinosauria, crocodilian, scutes, ratite, lechwe, carcharhinus, pterodactyls, monotremes, cebus, mammalia, tetrapod, honeyeater, faunas, barnacle goose, bushbuck, mutton chop, ambystoma, horned dinosaur, mammoths, jurassic period, whiptail, gastropod, sphinx moth, edmontosaurus, chiton, dinosaurs, palps,