During the excavation of the Dolmen of Errekatxuetako Atxa in 2006 several vertebrate remains were
found. Mammals are represented in the site by one lagomorph, six rodents, three insectivores, three
artiodactyls, two carnivores and one primate, the reptilians by one saurian and one ophidian and the
amphibians by one urodele and three anuran. The amphibians and reptilies are the most abundant
microvertebrate.which is not usual in other Holocene archeological and Paleontological sites of the
Cantabrian Basin. This could result from the presence of a wetland near the studied site. The vertebrate
assemblage indicates a humid temperate climate quite similar to that occurring in the area at present day