Hadrosaurs found there, alongside other dinosaurs, have traditionally been considered representatives of the phenomenon of insular dwarfism, as the continent was then made up of many smaller islands.

Around the Campanian stage, lambeosaurines of the tribe Corythosauria colonized the landmass of Laramidia (modern western North America) via Beringia and spread as far south as Mexico, radiating into a diverse array of a body plans, including famous taxa such as Parasaurolophus and Lambeosaurus.

However, fragmentary remains, including a partial humerus, resembling those of lambeosaurines have been reported from the late Maastrichtian-aged New Egypt Formation of New Jersey, USA.

[13] Xuwulong Bactrosaurus Telmatosaurus Gryposaurus Edmontosaurus Canardia Aralosaurus Pararhabdodon Tsintaosaurus Jaxartosaurus Blasisaurus Arenysaurus Parasaurolophus cyrtocristatus "Charonosaurus" jiayinensis Parasaurolophus tubicen Parasaurolophus walkeri Olorotitan Velafrons Amurosaurus Lambeosaurus clavinitialis Lambeosaurus magnicristatus Lambeosaurus lambei Corythosaurus intermedius Corythosaurus casuarius Hypacrosaurus altispinus "Magnapaulia" laticaudus Hypacrosaurus stebingeri A 2013 study describing the genus Canardia found it to form a grouping with Aralosaurus, therein named as Aralosaurini and defined as the most exclusive clade of hadrosaurs containing both Canardia and Aralosaurus.

[15][16][17] Daniel Madzia and colleagues registered the name under Phylocode in a 2021 study and redefined it as "the largest clade containing Aralosaurus tuberiferus and Canardia garonnensis but not Lambeosaurus lambei, Parasaurolophus walkeri, and Tsintaosaurus spinorhinus".

In addition to the various named genera, indeterminate remains from across the continent including the Basturs Poble bonebed were proposed to represent arenysaurs.

[16] The term Corythosaurini was first used by Brett-Surman in 1989, who characterized the taxon via reference to the premaxilary expansion into a hollow helmet-like cranial crest, as well as higher neural spines.

[26] In 2011, Sullivan et al. observed that by the rules of priority set by the International Code of Zoological Nomenclature, the name of the tribe ought to be Lambeosaurini due to its containing the defining type genus (Lambeosaurus) of its superior taxon (Lambeosaurinae).