ostracods, radula, faunas, gastropod, baleen whale, psittacosaurus, bryozoan, theropod dinosaur, iguanodon, metazoans, toothed whale, gracile, flatfishes, ichthyosaurs, brachiopod, coprolite, stromatolite, camarasaurus, crinoids, ammonites, hominoid, scutes, hyraxes, chiton, rotifer, plesiosaurs, insectivore, chordates, monotremes, robustus, molluscan, concretions, microfossil, green alga, jawless fish, holotype, permian period, amphioxus, tetrapod, spiny anteater, eukaryote, nudibranchs, braincase, theropod, comb jelly, eclogite, sauropod dinosaur, trilobite, archeopteryx, auks, flatworm, australopithecus africanus, stegodon, ornithopod, gigantea, mammuthus, echinoderms, peccary, syrtis major, protozoans, horned dinosaur, stickleback, borealis, duckbill, pteropod, mangabey, isopod, caecilian, middle paleolithic, carcharhinus, paranthropus, temporalis, suborder, mytilus, catfishes, scorpionfish, duckbilled, nephrite, mosasaur, protoceratops, aragonite, turnstones, homo erectus, massifs, legless lizard, archosaur, placentals, african clawed frog, neogene, semidesert, devonian period, gondwanaland, pongo pygmaeus, chambered nautilus, griffon vulture, dinoflagellate, anorthosite, planktonic, cenozoic era, ambystoma, phlogopite, placoderm, fossils, brachiopods, trilobites, cephalopods, bryozoans, graptolites, microfossils, foraminifera, tetrapods, cherts, foraminifers, finds, gastropods, stromatolites, arthropods, carbonates

ordovician, ordovician period