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. 2017 May 16;5:e3316. doi: 10.7717/peerj.3316

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© 2017 Dewaele 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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IRSNB 1226-M244b (A, D, G, J) and IRSNB M2269 (B, E, H, K) anterior thoracic vertebrae of Nanophoca vitulinoides; and corresponding drawings of the latter (C, F, I, L) in left lateral (A–C), anterior (D–F), dorsal (G–I), and ventral (J–L) view. Broken or obliterated areas are indicated in gray.