File:Parasaurolophus Holotype Skulls.png
Holotype skulls of the three currently diagnosed species within the Parasaurolophus clade.
(A) Parasaurolophus cyrtocristatus (FMNH P-27393); (B) Parasaurolophus walkeri (ROM 768); and (C) Parasaurolophus tubicen (NMMNH P-25100). Ages associated with each skull represent the approximate timing of each taxon.
Date
Source
https://peerj.com/articles/10669/
Author
Terry A. Gates, David C. Evans, Joseph J.W. Sertich
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