In this paper the micromammal assemblage found in the site of Ventalaperra (Karrantza, Bizkaia) is described.
The studied remains come from two different stratigraphic levels with archaeological remains. The lower
level has been placed in the Mousterian whereas the upper one is dated as Upper Palaeolithic. The
micromammals are represented in this site by one lagomorph, eight rodents, one chiropteran and two
insectivorous. The micromammal assemblage indicates a humid temperate climate with forest similar to
those occurring in the area at present day