HUALLASAURUS
a kritosaurinin hadrosaurid (duck-billed) dinosaur from the Late Cretaceous of Argentina.
Pronunciation: WAH-yah-SOR-us
Meaning: Duck lizard
Author/s: Rozadilla
et al. (
2022)
Synonyms: See
below
First Discovery: Río Negro, Argentina
Discovery Chart Position: #1064
Huallasaurus australis
(Southern Duck Lizard)Etymology
Huallasaurus is derived from the Mapudungun "hualla" (duck) and the the Greek "sauros" (lizard).
The
species epithet,
australis, means "southern" in Latin, referring to its discovery in southern Argentina. Mapudungun is a language spoken by the Mapuche people of south-central Chile and west-central Argentina.
Zoobank registry:
urn:lsid:zoobank.org:act:73D152DC-C8A1-4099-8A80-8288B4C00934.
Kritosaurus australis? (Bonaparte
et al., 1984)
Secernosaurus australis? (Wagner, 2001)
Scernosaurus koerneri? (Prieto Márquez and Salinas, 2010)
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Campanian-Maastrichtian
Age range: 72-68 mya
Stats:
Est. max. length: 9 meters
Est. max. hip height: ?
Est. max. weight: ?
Diet: Herbivore
References
• Rozadilla S, Brissón-Egli F, Agnolín L, Aranciaga-Rolando F, Mauro A and Novas FE (2022) "
A new hadrosaurid (Dinosauria: Ornithischia) from the Late Cretaceous of northern Patagonia and the radiation of South American hadrosaurids".
Journal of Systematic Palaeontology, 19(17): 1207–1235. DOI: 10.1080/14772019.2021.2020917.
• Bonaparte JF, Franchi MR, Powell JE and Sepulveda EG (1984) "La Formación Los Alamitos (Campaniano-Maastrichtiano) del sudeste de Rio Negro, con descripcion de Kritosaurus australis n. sp. (Hadrosauridae). Significado paleogeografico de los vertebrados".
Revista de la Asociación Geológica Argentina, 39 (3–4): 284–299. [names Kritosaurus australis.]
• Wagner JR (2001) "The hadrosaurian dinosaurs (Ornithischia:
Hadrosauria) of Big Bend National Park, Brewster County, Texas,
with implications for Late Cretaceous Paleozoogeography".
M.S. thesis. Texas Tech University, Austin, Texas. [Kritisaurus australis = Secernosaurus australis.]
• Prieto–Marquez A and Salinas GC (2010) "
A re–evaluation of Secernosaurus koerneri and Kritosaurus australis (Dinosauria, Hadrosauridae) from the Late Cretaceous of Argentina".
Journal of Vertebrate Paleontology, 30(3): 813–837. DOI: 10.1080/02724631003763508. [Kritosaurus australis + Secernosaurus australis = Secernosaurus koerneri.]
• Aureliano T, Ghilardi AM, Kaluza J and Martinelli AG (2025)
"Inside a duck-billed dinosaur: Vertebral bone microstructure of
Huallasaurus (Hadrosauridae), Upper Cretaceous of Patagonia".
The Anatomical Records (advance online publication).
DOI: 10.1002/ar.70040.
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To cite this page:
Atkinson, L.
"
HUALLASAURUS :: from DinoChecker's dinosaur archive".
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http://www.dinochecker.com/dinosaurs/HUALLASAURUS›. Web access: 06th Mar 2026.
