Cainozoic Research, 17(1), pp. 23-61, June 2017 23 The lower Pliocene gastropods of Le Pigeon Blanc (Loire- Atlantique, Northwest France), 4*. Neogastropoda (in part) Frank Van Dingenen1, Luc Ceulemans2 & Bernard M. Landau3, 4 1 Cambeenboslaan A 11, B-2960 Brecht, Belgium; email:
[email protected] 2 Avenue Général Naessens de Loncin 1, B-1330 Rixensart, Belgium; email:
[email protected] 3 Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, Netherlands; Instituto Dom Luiz da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal; and International Health Centres, Av. Infante de Henrique 7, Areias São João, P-8200 Albufeira, Portugal; email:
[email protected] 4 Corresponding author Received 25 February 2017, revised version accepted 1 April 2017 In this paper we review the Neogastropoda (in part) of the Zanclean lower Pliocene assemblage of Le Pigeon Blanc, Loire- Atlantique department, France, which we consider the ‘type’ locality for Assemblage III of Van Dingenen et al. (2015). Twenty-six species are recorded, of which three are new: Euthria palumbina nov. sp., Bartschia (Agassitula) harasewychi nov. sp., Brocchinia pigeonblancensis nov. sp. Aplus aequicostatus (Bellardi, 1877) is considered a junior subjective synonym of Aplus scaber (Millet, 1865). Fusus (Aptyxis) rostratus ligerianus Peyrot, 1938 is considered a junior subjective synonym of Aptyxis omphale (Millet, 1864). The data presented here concurs with that discussed in previous parts of this monograph, suggesting that average Sea Surface Temperatures off the NW French coast in the Zanclean lower Pliocene may have been warmer than they are at these latitudes today, possibly similar to those found today off the southern Portuguese coasts.