Systematic palaeontology................................................................................................................................... 4

Several Miocene and Pliocene continental fossiliferous localities in the Granada and Guadix basins have yielded fossil micromammals. Cricetids and glirids are known from most of these localities. This paper deals with the genera Apocricetus, Ruscinomys, Blancomys and Eliomys. The Cricetidae are important bios-tratigraphical markers, especially Apocricetus. The presence of A. barrierei in the locality PUR-4 indicates the beginning of the Early Ruscinian. The continuous record of Ruscinomys during the Late Turolian and the Early Ruscinian corroborates the lineage between R. schaubi and R. lasallei. The occurrence of a large specimen of Blancomys in the Granada Basin seems to indicate two phylogenetic lineages during the Late Turolian. The studied specimens of Eliomys allow us to confi rm the relationship between E. inter-medius and E. quercinus