Tribe

Valid Extinct

Kritosaurini

Lapparent and Lavocat 1955

Saurolophinae is a subfamily of hadrosaurid dinosaurs. It has since the mid-20th century generally been called the Hadrosaurinae, a group of largely non-crested hadrosaurs related to the crested sub-family Lambeosaurinae. However, the name Hadrosaurinae is based on the genus Hadrosaurus which was found in more recent studies to be more primitive than either lambeosaurines or other traditional "hadrosaurines", like Edmontosaurus and Saurolophus. As a result of this, the name Hadrosaurinae was dropped or restricted to Hadrosaurus alone, and the subfamily comprising the traditional "hadrosaurines" was renamed the Saurolophinae. Recent phylogenetic work by Hai Xing indicates that Hadrosaurus is placed within the monophyletic group containing all non-lambeosaurine hadrosaurids. Under this view, the traditional Hadrosaurinae is resurrected, with the Hadrosauridae being divided into two clades: Hadrosaurinae and Lambeosaurinae.

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

PBDB occurrences

Group

Dinosaures

Herbivore Ground dwelling, gregarious Terrestrial

click to enlarge

Mounted replica of a composite skeleton of Edmontosaurus annectens on display at the University of Oxford Museum, Oxford, England. The original skeleton is compiled from disarticulated fossil bones from a bonebed of the Hell Creek Formation, exposed in the Ruth Mason Quarry in Harding County, South Dakota. It is 8.5 m (28 ft.) long and the skull is almost 1 m (39 in.) in length.[1][2] ↑ Dinosaurs in the Museum. Oxford University Museum of Natural History (brochure, PDF), p. 7 ↑ BHI Fossil Replica Catalog 2012. Black Hills Institute of Geological Research, Inc., Hill City, SD, 2012 (PDF), p. 22 © Kevin Walsh from Bicester, England · CC BY 2.0 · Wikimedia

PBDB ↗ Wikipedia ↗

Classification

Dinosauria Unranked clade

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Ornithischia Unranked clade

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Neornithischia Unranked clade

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Pyrodontia Unranked clade

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Cerapoda Unranked clade

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Ornithopoda Suborder

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Iguanodontia Infraorder

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Euiguanodontia Unranked clade

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Dryomorpha Unranked clade

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Ankylopollexia Unranked clade

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Styracosterna Unranked clade

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Hadrosauriformes Unranked clade

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Hadrosauroidea Unranked clade

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Hadrosauridae Family

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Hadrosaurinae Subfamily

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Kritosaurini Tribe

Fossil sites 57 geolocated sites

Distribution

Top countries

🇺🇸 United States

🇨🇦 Canada

🇦🇷 Argentina

🇲🇽 Mexico

Geological formations

Dinosaur Park

Kirtland

Kaiparowits

Fruitland

Fruitland/Kirtland

Judith River

Aguja

Javelina

Milk River

Los Alamitos

Temporal distribution

Maastrichtian (72.2–66 Ma)

Campanian (83.6–72.2 Ma)

Santonian (85.7–83.6 Ma)

Bibliography

Original description

A. Prieto-Marquez. 2013. Skeletal morphology of Kritosaurus navajovius (Dinosauria: Hadrosauridae) from the Late Cretaceous of the North American south-west, with an evaluation of the phylogenetic systematics and biogeography of Kritosaurini. Journal of Systematic Palaeontology DOI ↗

Bibliography (34)

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E. R. Bender, T. A. Gates, and E. Johnson, L. E. Zanno. 2023. A new kritosaurin hadrosaurid (Dinosauria: Ornithopoda) from the Late Cretaceous of Colorado, USA. 14th Symposium on Mesozoic Terrestrial Ecosystems and Biota. The Anatomical Record 306 (S1)

P. J. Currie, J. Lü, and Y. Wang. 2023. A juvenile hadrosaur maxilla from the Dinosaur Park Formation (Campanian) of Dinosaur Provincial Park (Alberta, Canada). Windows into Sauropsid and Synapsid Evolution: Essays in Honor of Louis L. Jacobs

S. Rozadilla, F. Brissón-Egli, and F. L. Agnolín, A. M. Aranciaga-Rolando, F. E. Novas. 2021. 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 ↗

M. G. W. Thompson. 2018. Multidisciplinary Palaeoenvironmental Reconstruction of the Campanian Foremost Formation of Southern Alberta DOI ↗

T. M. Lehman, S. L. Wick, and J. R. Wagner. 2016. Hadrosaurian dinosaurs from the Maastrichtian Javelina Formation, Big Bend National Park, Texas. Journal of Paleontology 90(2):333-356 DOI ↗

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M. A. Loewen, M. E. Burns, and M. A. Getty, J. I. Kirkland, M. K. Vickaryous. 2013. Review of Late Cretaceous ankylosaurian dinosaurs from the Grand Staircase region, southern Utah. At the Top of the Grand Staircase: The Late Cretaceous of Southern Utah

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A. Prieto-Marquez. 2010. The braincase and skull of Gryposaurus notabilis (Dinosauria, Hadrosauridae), with a taxonomic revision of the genus. Journal of Vertebrate Paleontology 30(3):838-854 DOI ↗

T. A. Gates and S. D. Sampson. 2007. A new species of Gryposaurus (Dinosauria: Hadrosauridae) from the late Campanian Kaiparowits Formation, southern Utah, USA. Zoological Journal of the Linnean Society 151:351-376 DOI ↗

P. J. Currie. 2005. History of research. Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed. Indiana University Press, Bloomington

P. J. Currie and D. A. Russell. 2005. The geographic and stratigraphic distribution of articulated and associated dinosaur remains. Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed. Indiana University Press, Bloomington

D. H. Tanke. 2004. Mosquitoes and mud: the 2003 Royal Tyrrell Museum of Palaeontology expedition to the Grande Prairie region (northwestern Alberta, Canada). Alberta Palaeontological Society Bulletin 19(2):3-31

A. P. Hunt and S. G. Lucas. 1993. Cretaceous vertebrates of New Mexico. New Mexico Museum of Natural History and Science Bulletin 2:77-91

D. J. Varricchio. 1993. Taphonomy of Jack's Birthday site, a diverse dinosaur bone bed. Journal of Vertebrate Paleontology 13(3, suppl.):61A

J. R. Horner. 1992. Cranial morphology of Prosaurolophus (Ornithischia: Hadrosauridae) with descriptions of two new hadrosaurid species and an evaluation of hadrosaurid phylogenetic relationships. Museum of the Rockies Occasional Paper 2:1-119

J. F. Bonaparte and G. Rougier. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part VII—the hadrosaurs. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):155-161

S. G. Lucas, N. J. Mateer, and A. P. Hunt, F. M. O.'Neill. 1987. Dinosaurs, the age of the Fruitland and Kirtland Formations, and the Cretaceous-Tertiary boundary in the San Juan Basin, New Mexico. J. E. Fassett and J. K. Rigby, Jr. (eds.), The Cretaceous-Tertiary Boundary in the San Juan and Raton Basins, New Mexico and Colorado, Geological Society of America Special Paper 209:35-50 DOI ↗

J. F. Bonaparte, M. R. Franchi, and J. E. Powell, E. Sepulveda. 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 [The Los Alamitos Formation (Campanian-Maastrichtian) from the southeast of Rio Negro, with a description of Kritosaurus australis n. sp. (Hadrosauridae). Paleogeographic significance of the vertebrates]. Revista de la Asociación Geología Argentina 39(3-4):284-299

K. L. Davies. 1983. Hadrosaurian Dinosaurs of Big Bend National Park, Brewster County, Texas.

M . K. Brett-Surman. 1979. Phylogeny and palaeobiogeography of hadrosaurian dinosaurs. Nature 277:560-562 DOI ↗

J. G. Armstrong-Ziegler. 1978. An aniliid snake and associated vertebrates from the Campanian of New Mexico. Journal of Paleontology 52(2):480-483

B. S. Kues, J. W. Froehlich, and J. A. Schiebout, S. G. Lucas. 1977. Paleontological survey, resource assessment, and mitigation plan for the Bisti-Star Lake Area, northwestern New Mexico. Report to the Bureau of Land Management, Albuquerque, New Mexico

R. S. Lull and N. E. Wright. 1942. Hadrosaurian dinosaurs of North America. Geological Society of America Special Paper 40:1-242 DOI ↗

L. S. Russell. 1935. Fauna of the upper Milk River Beds, southern Alberta. Transactions of the Royal Society of Canada, series 3 4(29):115-128

W. A. Parks. 1919. Preliminary description of a new species of trachodont dinosaur of the genus Kritosaurus. Kritosaurus incurvimanus. Transactions of the Royal Society of Canada, series 3 13:51-59

C. W. Gilmore. 1916. Contributions to the geology and paleontology of San Juan County, New Mexico. 2. Vertebrate faunas of the Ojo Alamo, Kirtland and Fruitland Formations. United States Geological Survey Professional Paper 98-Q:279-302 DOI ↗

L. M. Lambe. 1914. On Gryposaurus notabilis, a new genus and species of trachodont dinosaur from the Belly River Formation of Alberta, with a description of the skull of Chasmosaurus belli. The Ottawa Naturalist 27(11):145-155

B. Brown. 1910. The Cretaceous Ojo Alamo beds of New Mexico with description of the new dinosaur genus <i>Kritosaurus</i>. Bulletin of the American Museum of Natural History 28(24):267-274