23The total shell production typical of the Pupilla association in the onshore site of Nantois 24 (Brittany, France) evidenced for the first time four brief, abrupt, warm and humid episodes 25 during the Upper Saalian (MIS 6) loess deposition. These "warming" events were also found 26 in the marine deposits of the Celtic Sea (MD03-2692 core). Comparison with the variations of 27 the sea-level, show that the "warming" episodes were not only of regional interest but 28 corresponded to global events ruled by precession and insolation cycles. Other comparisons 29 with biomarker records (mollusсs, charcoal and rodents) of the Paris Basin (Villiers-Adam) 30and Jersey Island (La Cotte de Saint Brolade) confirm the existence of these warmer events. 31Tentative correlations with the discontinuous Neanderthal dwelling phases recorded in 32Brittany suggest that these populations were mainly (only?) present in Westernmost Europe 33 during the warmer episodes.