The lower Pliocene gastropods of Le Pigeon Blanc (Loire-Atlantique, Northwest France), 4*. Neogastropoda (in part)

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.