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Description
Skeletal diagram of the Kaiparowits Parasaurolophus, tentatively referred to Parasaurolophus cyrtocristatus by Gates et al. 2021, though it is likely to be named as a new species in the future. The Kaiparowits Parasaurolophus is known from a full suite of different life stages ranging from a small yearling all the way to enormous adults. Of the four described individuals, three are fairly similar in size to the P. cyrtocristatus individuals from the Fruitland Formation. There are at least four other individuals that have not been described that appear to fall in the general 10-11 meter range.

Parasaurolophus appears to be the largest animal in the Kaiparowits Formation, though it lived alongside a richly diverse ecosystem. Besides Parasaurolophus we have large gryposaurs, a dwarf lambeosaurin, small bipedal ornithopods, tyrannosaurines, large caenagnathids, ornithomimids, azhdarchids, crocodilians, and more. There's a lot of cool stuff out there and even more is being described.

References

Bertozzo, F., Manucci, F., Dempsey, M., Tanke, D. H., Evans, D. C., Ruffell, A., & Murphy, E. (2021). Description and etiology of paleopathological lesions in the type specimen of Parasaurolophus walkeri (Dinosauria: Hadrosauridae), with proposed reconstructions of the nuchal ligament. Journal of Anatomy, 238(5), 1055-1069.

Farke, A. A., Chok, D. J., Herrero, A., Scolieri, B., & Werning, S. (2013). Ontogeny in the tube-crested dinosaur Parasaurolophus (Hadrosauridae) and heterochrony in hadrosaurids. PeerJ, 1, e182.

Gates, T. A., Evans, D. C., & Sertich, J. J. (2021). Description and rediagnosis of the crested hadrosaurid (Ornithopoda) dinosaur Parasaurolophus cyrtocristatus on the basis of new cranial remains. PeerJ, 9, e10669.

Gates, T. A., Evans, D. C., Birthisel, T., Bourke, & J., Zanno, L. (2017) A new species of Parasaurolophus from the Upper Cretaceous Kaiparowits Formation of southern Utah based on a series of skulls. Meeting Program and Abstract Book of the 77th Annual Meeting of the Society of Vertebrate Paleontology, 117.

Ostrom, J. H. (1961). A new species of hadrosaurian dinosaur from the Cretaceous of New Mexico. Journal of Paleontology, 575-577.

Ostrom, J. H. (1963). Parasaurolophus cyrtocristatus, a crested hadrosaurian dinosaur from New Mexico. Chicago Nat. Hist. Mus..

Sullivan, R. M., & Williamson, T. E. (1999). A New Skull of Parasaurolophus (Dinosauria: Hadrosauridae) from the Kirtland Formation of New Mexico and a Revision of the Genus: Bulletin 15 (Vol. 15). New Mexico Museum of Natural History and Science.

Velasco, A. A. R., Aguilar, F. J., Hernández-Rivera, R., Maussán, J. L. G., Rodríguez, M. L., & Alvarado-Ortega, J. (2021). Tlatolophus galorum, gen. et sp. nov., a parasaurolophini dinosaur from the upper Campanian of the Cerro del Pueblo Formation, Coahuila, northern Mexico. Cretaceous Research, 126, 104884.

Updates

3/9/2022- Filled out the text a bit more and made a few minor tweaks to the skull and other bits of anatomy.

Description
Skeletal diagram of the Kaiparowits Parasaurolophus, tentatively referred to Parasaurolophus cyrtocristatus by Gates et al. 2021, though it is likely to be named as a new species in the future. The Kaiparowits Parasaurolophus is known from a full suite of different life stages ranging from a small yearling all the way to enormous adults. Of the four described individuals, three are fairly similar in size to the P. cyrtocristatus individuals from the Fruitland Formation. There are at least four other individuals that have not been described that appear to fall in the general 10-11 meter range.

Parasaurolophus appears to be the largest animal in the Kaiparowits Formation, though it lived alongside a richly diverse ecosystem. Besides Parasaurolophus we have large gryposaurs, a dwarf lambeosaurin, small bipedal ornithopods, tyrannosaurines, large caenagnathids, ornithomimids, azhdarchids, crocodilians, and more. There's a lot of cool stuff out there and even more is being described.

References

Bertozzo, F., Manucci, F., Dempsey, M., Tanke, D. H., Evans, D. C., Ruffell, A., & Murphy, E. (2021). Description and etiology of paleopathological lesions in the type specimen of Parasaurolophus walkeri (Dinosauria: Hadrosauridae), with proposed reconstructions of the nuchal ligament. Journal of Anatomy, 238(5), 1055-1069.

Farke, A. A., Chok, D. J., Herrero, A., Scolieri, B., & Werning, S. (2013). Ontogeny in the tube-crested dinosaur Parasaurolophus (Hadrosauridae) and heterochrony in hadrosaurids. PeerJ, 1, e182.

Gates, T. A., Evans, D. C., & Sertich, J. J. (2021). Description and rediagnosis of the crested hadrosaurid (Ornithopoda) dinosaur Parasaurolophus cyrtocristatus on the basis of new cranial remains. PeerJ, 9, e10669.

Gates, T. A., Evans, D. C., Birthisel, T., Bourke, & J., Zanno, L. (2017) A new species of Parasaurolophus from the Upper Cretaceous Kaiparowits Formation of southern Utah based on a series of skulls. Meeting Program and Abstract Book of the 77th Annual Meeting of the Society of Vertebrate Paleontology, 117.

Ostrom, J. H. (1961). A new species of hadrosaurian dinosaur from the Cretaceous of New Mexico. Journal of Paleontology, 575-577.

Ostrom, J. H. (1963). Parasaurolophus cyrtocristatus, a crested hadrosaurian dinosaur from New Mexico. Chicago Nat. Hist. Mus..

Sullivan, R. M., & Williamson, T. E. (1999). A New Skull of Parasaurolophus (Dinosauria: Hadrosauridae) from the Kirtland Formation of New Mexico and a Revision of the Genus: Bulletin 15 (Vol. 15). New Mexico Museum of Natural History and Science.

Velasco, A. A. R., Aguilar, F. J., Hernández-Rivera, R., Maussán, J. L. G., Rodríguez, M. L., & Alvarado-Ortega, J. (2021). Tlatolophus galorum, gen. et sp. nov., a parasaurolophini dinosaur from the upper Campanian of the Cerro del Pueblo Formation, Coahuila, northern Mexico. Cretaceous Research, 126, 104884.

Updates

3/9/2022- Filled out the text a bit more and made a few minor tweaks to the skull and other bits of anatomy.