Image: Pachyrhinosaurus ontogeny

Description: Pachyrhinosaurus perotorum skulls and integument reconstruction through ontogeny. Hypothesis of craniofacial changes in osteology and integument through some of the ontogenetic stages of Pachyrhinosaurus perotorum listed in Table 2. Stage 2 skull based on juvenile P. lakustai of Currie et al.. Stage 4 skull based on DMNH 21460. Stage 6 skull based on DMNH 22558. Right-side ‘life’ reconstructions based on hypotheses of Pachyrhinosaurus integument structures of Hieronymus et al. [10], and new data from DMNH 21460. Light tan indicates ‘normal’ skin, while dark brown indicates cornified scales, horns, sheaths, or other cornified tissue. Scale bar equals 50 cm.
Title: Pachyrhinosaurus ontogeny
Credit: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0065802#pone-0065802-g001
Author: Anthony R. Fiorillo, Ronald S. Tykoski
Usage Terms: Creative Commons Attribution 2.5
License: CC BY 2.5
License Link: http://creativecommons.org/licenses/by/2.5
Attribution Required?: Yes