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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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Anterior portions of premaxillae of Camarasaurus (A; modified from Madsen, McIntosh & Berman, 1995) and Galeamopus sp. SMA 0011 (B) in anterodorsal view, illustrating the states of characters 2 and 3. Not to scale.