Koutalisaurus (meaning "spoon lizard", in reference to the shape of the dentary) is a potentially dubious genus of extinct hadrosaurid dinosaur from the Arenysaurini.

It is based on a mostly complete dentary from the Maastrichtian-age Upper Cretaceous Tremp Formation near the town of Abella de la Conca, Lleida, Spain.

[5][3] This idea was later rejected after the Basturs Poble remains were reclassified as belonging to lambeosaurines such as Adynomosaurus and cf.

[8] A 2020 study by Nick Longrich and colleagues describing the genus Ajnabia found Koutalisaurus to be an arenysaurin.

The cladogram from their study's phylogenetic analysis is shown below:[4] Saurolophinae Aralosaurus Jaxartosaurus Nipponosaurus Tsintaosaurus Arenysaurus Pararhabdodon Koutalisaurus Basturs lambeosaurine Canardia Adynomosaurus Serrat del Rostiar lambeosaurine Blasisaurus Ajnabia Parasaurolophini Lambeosaurini