ABSTRACTis fauna results from the short-time excavation of a restricted fossiliferous level, following the opening of a trench for the installation of a gas conduit. Even if the amount of sediment is limited, the diversity of the fauna approaches that of other contemporaneous localities. Among the 40 vertebrate species, a few are amphibious, and most terrestrial. Among them, biochronological markers like Issiodoromys pauffiensis Vianey-Liaud, 1987 (Rodentia, eridomyidae) are better defined. is species is compared with the type population of the MP 26 Mammalian Paleogene standardlevel (Mas-de-Pauffié, Lot; early Chattian). In addition, evolutionary grades hitherto unknown are described for several less well represented species: a sciurid rodent Comtia n. gen., a molossid bat (Cuvierimops sp.), a probable talpid, and the hyaenodontid ereutherium thylacodes Filhol, 1876. e familial assignment of the snake Platyspondylia Rage, 1974 is discussed.e locality yielded the possible earliest shinisaurian lizard. e diversity of this new vertebrate fauna is compared to that of several localities from the same biochronological level (mainly Mas-de-Pauffié, Saint-Menoux, SaintHenri/Saint-André, Mümliswil-Hardberg and Oensingen 11). e choice of Mas-de-pauffié as the reference-locality for MP 26 is therefore supported.
RÉSUMÉ
Une nouvelle faune de vertébrés continentaux de l'Oligocène supérieur (MP26) à Saint-Privat-des-Vieux (Bassin d'Alès, Gard, Sud de France).Cette faune résulte de la brêve exploitation d'un petit niveau fossilifère mis au jour lors de l'ouverture d'une tranchée pour l'installation d'une conduite de gaz. Même si la quantité de sédiment fossilifère accessible était limitée, la diversité de la faune récoltée est du même ordre que celle de localités contemporaines. Parmi les 40 espèces de vertébrés reconnues, quelques unes sont amphibies mais la plupart est terrestre. Parmi elles, des marqueurs biochronologiques tel Issiodoromys pauffiensis Vianey-Liaud, 1987 (Rodentia, eridomyidae)
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