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. 2015 Apr 7;3:e857. doi: 10.7717/peerj.857

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© 2015 Tschopp et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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Skulls of Nigersaurus taqueti (A; modified from Schmitt, 2012) and Galeamopus sp. USNM 2673 (B) in occipital view. Note the reduced basal tubera in Nigersaurus (A; C84-1), and the convex (A; C 85-0), or concave (B; C85-2) posterior face of the tubera. Abb.: bpr, basipterygoid process; bt, basal tuber; cpr, crista prootica; fm, foramen magnum; oc, occipital condyle; popr, paroccipital process; so, supraoccipital. Skulls scaled to same occipital condyle height.