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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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(A) Regional map showing the southern part of the North Sea basin with bordering countries and labeled capital cities (yellow) and the Antwerp area (red). (B) Close-up of the Antwerp area with color-coding for the outcropping Paleogene and Neogene strata underneath the Quaternary top layer. The sections of the fortification walls around Antwerps used by Van Beneden (1877) as localities for the Neogene marine mammals (including seals) from the Antwerp area are indicated by dashed lines and numbered as in Van Beneden (1877), using Vanden Broeck (1878). (C) Stratigraphic legend for the Paleogene and Neogene strata from the Antwerp Area, with small seals indicating the stratigraphic occurrence of the neotype (IRSNB M2276) and other recently discovered specimens of Nanophoca vitulinoides Abbreviations: NL, Netherlands; GER, Germany; LUX, Luxembourg; FRA, France; UK, United Kingdom; BEL, Belgium; Lux., Luxembourg City; Plei., Pleistocene; Plio., Pliocene; Pi., Piacenzian; Za., Zanclean; Mes., Messinian; Ser., Serravallian; Lang., Langhian; Burdigal., Burdigalian; Aq., Aquitanian; Priabon., Priabonian; Barton., Bartonian; Fm., Formation. Image based on data from Dienst Ondergrond Vlaanderen (DOV; dov.vlaanderen.be).