Arenysaurini

Subgroups

Previously, the European taxa Arenysaurus and Blasisaurus had been found together either outside Lambeosaurini or as members of Parasaurolophini, but according to the results of Prieto-Márquez and colleagues in 2013 there would have been three independent dispersals of lambeosaurines into Europe, as aralosaurins, tsintaosaurins, and lambeosaurins. This interpretation of relationships was contested by American paleontologist Nick Longrich and colleagues in 2021, who described the new African genus Ajnabia and included geographic characters in their analysis. Resultingly, all European lambeosaurines were united, along with Ajnabia, as a clade of early lambeosaurines outside Parasaurolophini and Lambeosaurini that was given the name Arenysaurini. Defined as all taxa closer to Arenysaurus ardevoli than Tsintaosaurus spinorhinus, Parasaurolophus walkeri or Lambeosaurus lambei, neither Tsintaosaurini or Aralosaurini were recovered as their European members moved into Arenysaurini. Early-branching lambeosaurines included the Asian genera Aralosaurus, Jaxartosaurus, Tsintaosaurus and Nipponosaurus, Arenysaurini included Arenysaurus, Pararhabdodon, Koutalisaurus, Canardia, Adynomosaurus, Blasisaurus and Ajnabia, Parasaurolophini included Angulomastacator, Adelolophus, Parasaurolophus and Charonosaurus, and Lambeosaurini included Olorotitan, Magnapaulia, Lambeosaurus, Sahaliyania, Amurosaurus, Hypacrosaurus, Velafrons and Corythosaurus.