Two new chelonian species from the Lower Miocene of the Ebro Basin (Bardenas Reales of Navarre)

Two new cryptodiran turtle species are here described on the basis of shell material from the Lower Miocene (Biozone A of Ramblian, MN3) of the Barden as Reales of Navarre. They are Chelydropsis apellanizi n. sp., which repres ents the first mention of this genus in the Iberian Peninsula and the most occidental chelydrid known in Europe, and Ptychogaster (Temnoclemmys barden ensis n. sp., provisionally regarded as the oldest component of Temnoclemmy s. The composition of the turtle fauna from the Bardenas Reales of Navarre. which also includes Ptychogaster ronheimensis and Trionyx sp., suggests a calm-water lacustrine environment under an intertropical to subtropical cli mate. ((C) Academie des sciences/Elsevier; Paris.)