Los pequeños mamíferos de Koskobilo (Olazti, Nafarroa). Apuntes biocronológicos, paleoecológicos y tafonómicos

Abstract

Despite the complex origin of the remains of the Koskobilo (Olazti, Navarre), the uniqueness of some of the species of large mammals recovered and its location in the northern Iberian region with few Middle Pleistocene records, warrants the description and contextualization of the remains found there. A total of 91 small-mammal remains were recovered. Among the 9 species identified,it is worth mentioning the remains of Marmota marmota and Castor fiber, both relatively scarce infossil contexts during the Pleistocene. The origin of the small-mammal assemblage is unclear, butsome predation signs are identified. Despite the fact that some of the large-mammal species are of Middle Pleistocene age, the small-mammal species point to an Upper Pleistocene chronology, as wellas happens with other larger species of mammals. The nebulous origin of the assemblage limits thepaleocological interpretation, but the presence of alpine-subalpine meadows is described, associatedto cold and wet climate