The Coniacian-Santonian ammonite faunas oi the Corbieres are revised, and nearly 100 species/subspecies described. The Coniacian can be subdivided into four assemblage zones, as elsewhere in Western Europe, with successive zones of Forresteria (Harleites) petrocoriensis, Peroniceras (Peroniceras) tridorsatum, Gauthiericeras margae and Paratexanites serratomarginatus. The base of the Santonian is a level of marked faunal turnover. A single Assemblage Zone of Placenticeras polyopsis is recognized, divided into Assemblage Subzones of Nowakites carezi, Texanites (Texanites) gallicus, and Placenticeras paraplanum. These species have partially overlapping ranges. Neither P. polyopsis nor T. (T.) gallicus range to the base of the Santonian in the Corbieres; placenticeratids and texanitids are absent from the lowest part of the stage there, presumably as a result of ecological exclusion. The ammonite succession is integrated with the sequence stratigraphy oi the interval, and provides a basis for assigning numerical ages to parts of the sequence.