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. 2016 Jan 28;4:e1572. doi: 10.7717/peerj.1572

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©2016 Marx 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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Basicranium and periotic of Metopocetus hunteri: (A) right portion of basicranium in ventral view; (B) central portion of periotic in ventromedial view; (C) compound posterior process of tympanoperiotic in external view; (D) central portion of periotic in dorsal view. Abbreviations: am, anteromedial; ant, anterior; fac., facial sulcus; lat, lateral; parocc. conc., paroccipital concavity; pm, posteromedial; pos, posterior; post. process, compound posterior process; ven, ventral.