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Birds Lagerpeton Theropoda Nemegtonykus Prehistoric Life Feathered Dinosaurs Ankylosaurus Wilaru Qingxiusaurus youjiangensis Theropods Europatitan Paractiornis perpusillus Tyrannosaurus rex Amygdalodon Isaberrysaura Evolution Classification Ecosystems Paleoecology Herbivores Dromaeosaurs Sauropods Yutyrannus Ceratopsians Nanotyrannus Maiasaura Ankylosaurs Cretaceous Period Yingshanosaurus jichuanensis Bissektipelta Cretaceous Ecology Sauropodomorphs Kulindadromeus Ornithopods Dinosaur Classification Fujianvenator Social Behavior Dinosaur Species Berthasaura leopoldinae Isaberrysaura mollensis Behavior Enantiornithes Kulindadromeus zabaikalicus Ankylosauria Australovenator Paractiornis Pelagornis Nanotyrannus lancensis Tyrannosaurs Paleoart Extinction Therizinosaurs Zhongyuansaurus Melanorosaurus readi Avian Dinosaurs Spicomellus Fossils Enantiornithines Pachycephalosaurus Evolutionary Biology Sinosauropteryx Halszkaraptor Yutyrannus huali Melanorosaurus Caihong juji Hadrosaurs Kentrosaurus aethiopicus Pachycephalosaurs Non-avian Dinosaurs Megaraptor Ornithischia Megaraptors Sauropodomorpha Dinosaur Behavior Lourinhanosaurus Chialingosaurus kuani Misconceptions Falcatakely forsterae Evgenavis nobilis Coronosaurus brinkmani Early Dinosaurs Oviraptorosaur Microraptorines Sauropoda Predators Atrociraptor Habitat Stegosaurus Brasilotitan Spinosaurus Dinovember Gnatalie Naming Flight evolution Scolosaurus cutleri Spinops sternbergorum Duonychus tsogtbaatari Barosaurus Morrison Formation Antarctopelta
By reading growth rings in a throat bone, researchers show the holotype had stopped growing, resolving a decades-long identification question.
