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Image: Growth series of Stegoceras validum

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Description: Growth series of Stegoceras validum in dorsal (top) and lateral (bottom) views. This series depicts the transition from a flat-headed to domed frontoparietal morphology that occurred through ontogeny in this taxon. A, UCMZ(VP) 2008.001 B, AMNH 5450 (holotype of Ornatotholus browni); C, CMN 138; D, CMN 515 (lectotype of Stegoceras validum); E, UALVP 2; F, ROM 53555. Portions of ROM 53555 are reconstructed including the nasals (cropped) and the lateral margins. Reconstructed portions are visible as dark grey areas in the CT images (Fig. 9).
Title: Growth series of Stegoceras validum
Credit: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0021092
Author: Ryan K. Schott, David C. Evans, Mark B. Goodwin, John R. Horner, Caleb Marshall Brown, Nicholas R. Longrich
Usage Terms: Creative Commons Attribution 2.5
License: CC BY 2.5
License Link: http://creativecommons.org/licenses/by/2.5
Attribution Required?: Yes

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