Dentary groove morphology does not distinguish 'Nanotyrannus' as a valid taxon of tyrannosauroid dinosaur. Comment on: “Distribution of the dentary groove of theropod dinosaurs: Implications for theropod phylogeny and the validity of the genus Nanotyrannu
Keywords: Nanotyrannus; Tyrannosaurus; Tyrannosauroid; Dinosaur; Theropod; Ontogeny;