Editing Corythosaurus (section)

{{Short description|Extinct genus of dinosaurs}}
{{good article}}
{{automatic taxobox
| fossil_range = [[Late Cretaceous]] ([[Campanian]]), {{fossil_range|earliest=77.5|77|75.7|latest=74.8}}
| image = Carnegie Corythosaurus.jpg
| image_caption = Skeleton in [[Carnegie Museum of Natural History|Carnegie Museum]]
| taxon = Corythosaurus
| authority = [[Barnum Brown|Brown]], [[1914 in paleontology|1914]]
| type_species = {{extinct}}'''''Corythosaurus casuarius'''''
| type_species_authority = Brown, 1914
| subdivision_ranks = Species
| subdivision =
*{{extinct}}'''''C. casuarius'''''<br /><small>Brown, 1914 ([[type species|type]])</small>
*{{extinct}}'''''C. intermedius'''''<br /><small>([[William Parks (paleontologist)|Parks]], 1923 [originally ''[[Stephanosaurus]]''])</small>
| synonyms =
{{collapsible list|bullets=
 |title=List
| ''Corythosaurus excavatus''<br /><small>[[Charles W. Gilmore|Gilmore]], 1923</small>
| ''[[Stephanosaurus]] intermedius''<br /><small>Parks, 1923</small>
| ''[[Procheneosaurus]] erectofrons''<br /><small>(Parks, 1931 [originally ''Tetragonosaurus''])</small>
| ''[[Tetragonosaurus]] erectofrons''<br /><small>Parks, 1931</small>
| ''Corythosaurus bicristatus''<br /><small>Parks, 1935</small>
| ''Corythosaurus brevicristatus''<br /><small>Parks, 1935</small>
}}
}}

'''''Corythosaurus''''' ({{IPAc-en|k|ə|ˌ|r|ɪ|θ|ə|ˈ|s|ɔːr|ə|s}};<ref>{{cite Merriam-Webster|Corythosaurus|access-date=2022-09-27}}</ref> {{lit|helmeted lizard}}) is a [[genus]] of [[hadrosaurid]] "duck-billed" [[dinosaur]] from the [[Late Cretaceous]] [[Period (geology)|period]], about 77–75.7&nbsp;[[million years ago]], in what is now [[Laramidia|western North America]]. Its name is derived from the [[Ancient Greek|Greek]] word κόρυς, meaning "helmet",  named and described in 1914 by [[Barnum Brown]]. ''Corythosaurus'' is now thought to be a [[Lambeosaurinae|lambeosaurine]], thus related to ''[[Lambeosaurus]]'',  ''[[Nipponosaurus]]'', ''[[Velafrons]]'', ''[[Hypacrosaurus]]'', and ''[[Olorotitan]]''. ''Corythosaurus'' has an estimated length of {{convert|7.7|-|9|m|ft}} and has a skull, including the crest, that is {{convert|70.8|cm|in ft}} tall.

''Corythosaurus'' is known from many complete specimens, including the nearly complete [[holotype]] found by Brown in 1911. The holotype skeleton is only missing the last section of the tail and part of the front legs, but was preserved with impressions of polygonal scales. ''Corythosaurus'' is known from many skulls with tall crests that resemble those of the [[cassowary]] and a [[Corinthian helmet]]. The most likely function of the crest is thought to be vocalization. As in a trombone, sound waves would travel through many chambers in the crest and then get amplified when ''Corythosaurus'' exhaled. One ''Corythosaurus'' specimen has even been preserved with its last meal in its chest cavity. Inside the cavity were remains of [[conifer]] needles, [[seeds]], twigs, and fruits, suggesting that ''Corythosaurus'' probably fed on all of these.<ref>{{cite book |last1=Sander |first1=P. Martin |last2=Gee |first2=Carole T. |last3=Hummel |first3=Jürgen |last4=Clauss |first4=Marcus |title=Plants in Mesozoic Time: Morphological Innovations, Phylogeny, Ecosystems |date=2010 |publisher=Indiana University Press |location=Bloomington, Indiana |isbn=9780253354563 |pages=341, 343 |chapter-url=https://books.google.com/books?id=FHcR3osfkxMC&q=corythosaurus+diet+fruits+conifers&pg=PA331 |access-date=13 October 2020 |chapter=14: Mesozoic Plants and Dinosaur Herbivory}}</ref>

The two species of ''Corythosaurus'' are both present in slightly different levels of the [[Dinosaur Park Formation]]. Both still co-existed with [[theropod]]s and other [[ornithischia]]ns, like ''[[Daspletosaurus]]'', ''[[Brachylophosaurus]]'', ''[[Parasaurolophus]]'', ''[[Scolosaurus]]'', and ''[[Chasmosaurus]]''.