Related by context. Frequent words. (Click for all words.) 55 forelimbs 53 pterosaur 51 Tiktaalik 50 tyrannosaur 50 subfamily 49 theropods 49 Archaeopteryx 49 tetrapods 49 hind limbs 48 phylogeny 48 bipedalism 47 asexual reproduction 47 vertebrate 47 morphology 47 mandibles 47 sauropod 46 morphological 46 carnivorous dinosaurs 46 upright posture 46 hominins 46 flagella 46 arthropods 46 hominid 45 vertebrates 45 dinos 45 phylum 45 hominin 45 brontosaurus 45 sauropods 44 melanosomes 44 Australopithecus 44 marine invertebrates 44 velociraptor 44 protuberance 44 dorsal fin 44 Mesozoic 44 canine teeth 44 Homo floresiensis 44 pterodactyl 44 dinosaurs 43 plesiosaur 43 globular 43 mammal 43 evolutionarily 43 taxa 43 T. rex 43 evolutionary 43 bipedal 43 trilobites 43 mandible 43 dorsal 43 Tyrannosaurus 43 mammalian species 43 sea anemone 42 conical 42 pterosaurs 42 dung beetle 42 Ardipithecus 42 multicellular 42 dinosaur 42 hadrosaur 42 arthropod 42 bony 42 bipeds 42 locomotion 42 herbivore 42 triceratops 42 herbivorous 42 boney 42 protrusion 42 landmasses 42 Neandertal 42 baleen whales 42 Longrich 42 mammals 42 stegosaurus 42 musculature 42 phylogenetic 42 lineages 41 biped 41 fossilized 41 elongated 41 mammalian 41 fossils 41 palaeontologists 41 evolutionary biologists 41 sea anemones 41 squids 41 protrusions 41 tadpole 41 tapir 41 bony fish 41 fossilized remains 41 striations 41 woolly mammoth 41 protozoan 41 Cretaceous Period 41 phenotype 41 Homo erectus 40 Late Cretaceous 40 striated