En este trabajo se presentan los resultados del estudio de un conjunto paleontológico recuperado en la cueva de Oilaskoa entre 1981 y 1986. La ubicación de esta cueva en el extremo occidental del Pirineo, a 1036 metros de altitud y su aislamiento con respecto a otras acumulaciones del mismo tipo, hacen de este conjunto una oportunidad única para conocer la población de Ursus spelaeus Rosenmüller que pobló el occidente del Pirineo durante el Pleistoceno superior.

Lan honetan, 1981 eta 1986 artean Oilaskoa kobazuloan berreskuratutako multzo paleontologiko baten azterketako emaitzak azaltzen dira. Kobazuloa Pirinioetako mendebaldeko muturrean dago, 1036 metroko altitudean, eta era bere bereko beste metaketa batzuekiko isolatuta dago. Hori dela eta, multzoa aukera paregabea da Goi Pleistozenoan Pirinioetako mendebaldean bizi izan zen Ursus spelaeus Rosenmüller-en populazioa ezagutzeko.

This work presents the results of the study of a paleontological group recovered in the Oilaskoa cave between 1981 and 1986. The location of this sit in the western end of the Pyrenees at 1036 meters of altitude and its isolation with respect to other accumulations of the same type, Oilaskoa a unique opportunity to get to know the population of Ursus spelaeus Rosenmüller. In the following pages, this accumulation of 3310 remains is contextualized and analyzed. A series of numerical dating (AAR) have made possible to locate its formation between MIS 4 and MIS 3. Subsequently, we proceed to a description detailed analysis of the remains studied, including an analysis of the Ursus spelaeus population, based on dental wear and a biometric analysis. All this allows a comparative analysis carried out with other groups of similar characteristics located in the Iberian Peninsula.