archaeopteryx, australopithecines, sauropods, mammals, theropod, forelimbs, vertebrates, archeopteryx, bipedalism, dinosaurs, ichthyosaurs, crocodilians, theropod dinosaur, tetrapods, plesiosaurs, crinoids, ostracods, psittacosaurus, pterodactyls, monotremes, tyrannosaur, echinoderms, braincase, placoderms, fossils, trilobites, hominids, robustus, damselflies, habilis, dragonflies, arthropods, paranthropus, genus homo, eukaryote, placentals, flatfishes, australopithecus afarensis, chordates, iguanodon, pileated, dinos, gracile, phylogeny, australopithecus, protoceratops, springtails, hominoid, anthropoids, stegodon, angiosperms, archosaur, hadrosaur, diatoms, ratites, apatosaurus, chlamydomonas, paleobiology, daddy longlegs, herbivores, phyla, taxa, sifaka, genus australopithecus, setae, brachiosaurus, caecilians, ceratopsian, tailless, homo sapiens, sea scorpion, smilodon, devonian period, isopods, passerines, locomotion, planktonic, barnacle goose, baleen whale, insectivores, brachiopods, sauropod dinosaur, homo erectus, utahraptor, mammoths, ornithopod, coelacanths, stegosaurs, moa, titanosaur, velociraptor, faunas, mandibles, eyespots, ankylosaurus, pileated woodpecker, australopithecus africanus, protists, spicules, peccary, prokaryotes, pachycephalosaurus, amphibians, marsupials, reptiles, cephalopods, dinosaur, primates, ammonites, apes, lemurs, carnivora, carnivores, cetaceans, hominid, mollusks

archosaur, archosauria, archosaurian, archosaurian reptile, order pterosauria, pterosauria, subclass archosauria