Abstract
This work provides a review of the taxonomic diversity, phylogenetic relationships, and historical biogeography of the seven described hadrosauroids from Mexico. Their interrelationships were inferred via maximum parsimony analysis, which indicates that these taxa are part of five groups: unnamed clade of basal Hadrosauromorpha (Huehuecanauhtlus tiquichensis), Kritosaurini (Kritosaurus navajovious, IGM 6685), Edmontosaurini (Sabina's taxon, PASAC-1), Parasaurolophini (Tlatolophus galorum), and Lambeosaurini (Magnapaulia laticaudus, Velafrons coahuilensis, and Latirhinus uitstlani). To trace back their biogeographical history, the ancestral range reconstruction was implemented using Statistical Dispersal Vicariance Analysis, which reveals that these hadrosauroids represent a southern Laramidia-Asia common ancestral range. It also shows that these dinosaurs evolved via three vicariance and two dispersals events during the Turonian, Coniacian, Santonian and Campanian, representing a complex biogeographical history.
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