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Description
Skeletal diagram of Parasaurolophus walkeri, a large lambeosaurine hadrosaur from the Late Cretaceous of Alberta (and likely Montana, though we haven't found it there yet). The two different colors on the neck represent the minimum and maximum amount of musculature and ligaments.

Parasaurolophus is very robust hadrosaur, and its relative rarity in the Dinosaur Park Formation compared to other hadrosaurs may suggest it preferred more inland habitats. That being said, while the holotype ROM 768 is the only specimen officially considered to be P. walkeri, there are several other partial parasaurolophin skeletons known from Dinosaur Park and since P. walkeri is the only parasaurolophin known from that time and space, so it seems like a pretty reasonable lump.

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.

Dalla Vecchia, F. M. (2020). The unusual tail of Tethyshadros insularis (Dinosauria, Hadrosauroidea) from the Adriatic Island of the European Archipelago. Rivista Italiana di Paleontologia e Stratigrafia, 126(3).

Evans, D. C., Bavington, R., & Campione, N. E. (2009). An unusual hadrosaurid braincase from the Dinosaur Park Formation and the biostratigraphy of Parasaurolophus (Ornithischia: Lambeosaurinae) from southern Alberta. Canadian Journal of Earth Sciences, 46(11), 791–800. doi:10.1139/e09-050

Parks, W.A. (1922). "Parasaurolophus walkeri, a new genus and species of trachodont dinosaur". University of Toronto Studies: Geological Series. 13: 5–32.

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.

Description
Skeletal diagram of Parasaurolophus walkeri, a large lambeosaurine hadrosaur from the Late Cretaceous of Alberta (and likely Montana, though we haven't found it there yet). The two different colors on the neck represent the minimum and maximum amount of musculature and ligaments.

Parasaurolophus is very robust hadrosaur, and its relative rarity in the Dinosaur Park Formation compared to other hadrosaurs may suggest it preferred more inland habitats. That being said, while the holotype ROM 768 is the only specimen officially considered to be P. walkeri, there are several other partial parasaurolophin skeletons known from Dinosaur Park and since P. walkeri is the only parasaurolophin known from that time and space, so it seems like a pretty reasonable lump.

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.

Dalla Vecchia, F. M. (2020). The unusual tail of Tethyshadros insularis (Dinosauria, Hadrosauroidea) from the Adriatic Island of the European Archipelago. Rivista Italiana di Paleontologia e Stratigrafia, 126(3).

Evans, D. C., Bavington, R., & Campione, N. E. (2009). An unusual hadrosaurid braincase from the Dinosaur Park Formation and the biostratigraphy of Parasaurolophus (Ornithischia: Lambeosaurinae) from southern Alberta. Canadian Journal of Earth Sciences, 46(11), 791–800. doi:10.1139/e09-050

Parks, W.A. (1922). "Parasaurolophus walkeri, a new genus and species of trachodont dinosaur". University of Toronto Studies: Geological Series. 13: 5–32.

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.