The fossiliferous localities of Aumelas and Saint-Martin-de-Londres in the Montpellier limestones (Hérault, France), known since the 1960s and 1980s, were originally dated as late middle Eocene (Lutetian), close to the European Mammal Palaeogene Reference Level 13 (MP13). This period is a key time interval in the initial radiation of European endemic mammals. We present here a systematic revision of the artiodactyl fauna from Aumelas and Saint-Martin-de-Londres in order to propose a biochronological revision of these localities. We identified five artiodactyl species: Aumelasia gabineaudi, Dichobune aff. robertiana, Eurodexis cf. russelli, Eurodexeinae indet. and Lophiobunodon minervoisensis. Two of these species are known in both localities. Comparisons with other European localities support an earlier dating than late middle Eocene for Aumelas and Saint-Martin-de-Londres. These localities seem to be close to the Ypresian/Lutetian boundary and could constitute a rare record of this period in Europe. The age of these localities is critical for discussing the initial radiations of endemic European artiodactyl families (Cebochoeridae, Choeropotamidae, Mixtotheriidae, Anoplotheriidae, Xiphodontidae, Cainotheriidae and Amphimerycidae). This systematic revision allows us to test the validity of phylogenetic relationships between these families using cladistic analyses. Our results question the monophyly of Dichobunidae and Choeropotamidae but support the older concept of Haplobunodontidae. This study, which constitutes a first step towards a better understanding of their evolutionary history, suggests that the European artiodactyl radiation took place close to the Ypresian/Lutetian boundary.

自1960年代和1980年代以来，蒙彼利埃石灰岩（法国埃罗省）中的Aumelas和Saint-Martin-de-Londres的化石化地点最初定于中始新世（鲁特西亚），接近欧洲哺乳动物古近纪参考级别13 （MP13）。这个时期是欧洲地方性哺乳动物初次辐射的关键时间间隔。我们在这里提出对来自Aumelas和Saint-Martin-de-Londres的动手动物区系的系统修订，以便提出对这些地区的生物年代学修订。我们确定了五个动io物种：Aumelasia gabineaudi，Dichobune aff。robertiana，Eurodexis参见 russelli，Eurodexeinae indet。和Minphivoisensis Lophiobunodon。这些物种中有两个在两个地方都知道。与其他欧洲地区的比较表明，对于Aumelas和Saint-Martin-de-Londres，其始于中新世晚期。这些地方似乎接近伊普尔人/鲁特人的边界，并可能构成这一时期在欧洲的罕见记录。这些地区的年龄对于讨论欧洲特有的偶蹄动物科（Cebochoeridae，Choeropotamidae，Mixtotheriidae，Anoplotheriidae，Xiphodontidae，Cainotheriidae和Amphimerycidae）的辐射至关重要。这个系统的修订允许我们使用进化分析来检验这些家族之间的系统发育关系的有效性。我们的结果质疑天牛科和虎耳科的单面性，但支持单倍体科的较早概念。这项研究，