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. 2014 Jan 28;9(1):e87236. doi: 10.1371/journal.pone.0087236

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© 2014 Evans et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A, anterior; B, posterior; C, dorsal; D, ventral; E, left lateral; and F, right lateral views. Vertebra A interpreted as possible fourth presacral vertebra and placed in that position for digital reconstruction in Figs 1, 2, 5, and 32.