Rodents of two new middle miocene karstic localities from Eastern Pyrenees(South France) with a new species of Pseudofahlbuschia (Rodentia, Mammalia)

Two karstic fissure fillings (Baixas 200 & 201) have yielded for the first time, teeth of a rare rodent genus in the Middle Miocene from Europe. This genus Pseudofahlbuschia was formerly recorded only from Spain. P. catalauni ca sp. nov. is different from the type-population of P. jordensis defined i n Spain. Other rodents associated with the new species, among which Megacri cetodon fournasi,M. minor, M. similis, indicate a Middle Miocene age for th e localities, ranging between the Sansan and La Grive M (MN6/7) reference-l evels. The presence of the genus shows a new distribution within the Megacr icetodon. The large sized lineage is indeed much less abundant than it is i n other localities,while it is the opposite for small sized species.