Name Huehuecanauhtlus
Order Ornithischia
Suborder Ornithopoda
Name Translation "Ancient duck"
Period Late Cretacous
Location Mexico - Central America
Diet Herbivore

Huehuecanauhtlus is a genus of hadrosauroid that lived during the Santonian stage of the Late Cretaceous. It lived in what is now Michoacán, western Mexico. It contains a single species, H. tiquichensis.


The name Huehuecanauhtlus is derived from Náhuatl (a dialect group of Aztecan languages) huehuetl, meaning "ancient" and canauhtli, meaning "duck" in reference to hadrosaurs often being called “duck-billed dinosaurs”. The species name, tiquichensis, honors the town of Tiquicheo.


Huehuecanauhtlus skeletal

Known fossils of Huehuecanauhtlus

Huehuecanauhtlus is known only from two individuals. Both specimens were collected in 2012 near the Barranca Los Bonetes area. The holotype is represented by a fragmentary skull, specifically partial left maxilla, dentary fragment, and postcranial skeleton. The paratype is known only from two left teeth, a fragmented left dentary, and a cervical prezygapophysis.


H tiquichensis

Recreation of H. tiquichensis by adamworks

Huehuecanauhtlus is known from very fragmented fossils, so its appearance is mostly guesswork. It shared the same body plan as other hadrosaurs, taking on a mostly quadrupedal stance when walking or grazing, although it could've reared onto its hind legs to reach higher food sources or escape predators. It likely fed on low-lying plants, clipping them with its toothless beak and grinding them with its batteries of cheek teeth.