monotremes, chordates, faunas, psittacosaurus, eukaryote, phyla, archosaur, phylogenies, australopithecines, placental mammal, lineages, habilis, genus australopithecus, flatfishes, ichthyosaurs, coevolution, paranthropus, plesiosaurs, metazoan, theropod, pan troglodytes, stegodon, theropod dinosaur, gondwanaland, platypuses, peromyscus, hominoids, homo habilis, amphioxus, taxa, introgression, vertebrate, australopithecus africanus, genus homo, sifaka, angiosperms, mammalia, homo erectus, lagomorphs, anthropoids, laurasia, megafauna, echidnas, mangabeys, conodonts, prokaryotes, protoceratops, crocodilians, peccary, damselfish, dinosauria, mus musculus, xenopus, ratites, prairie vole, gymnosperms, subfamily, spiny anteater, tyrannosaurs, devonian period, jurassic period, triassic period, robustus, clade, pongo pygmaeus, suborder, prosimians, archeopteryx, african clawed frog, ostracods, echinoderms, bryozoans, rheas, maned wolf, siamangs, hyraxes, marsupials, biogeography, archaeopteryx, gametophyte, tuataras, tetrapods, erectus, neotropical, crinoids, africanus, comparative anatomy, multicellularity, bilaterally symmetrical, smilodon, cichlids, forelimbs, mammals, guanacos, australopithecus, baleen whale, thylacine, jawless fish, brachiopods, panthera leo, permian period, cretaceous period, reptiles, vertebrates, primates, ruminants, ungulates, amphibians, arthropods, mammal, carnivores, hominids, artiodactyls, lemurs