The small-mammal assemblage from Koskobilo (Olazti, Navarre). Biochronological, paleoecological and taphonomic notes
Authors
M. Fernández-García
Institut Català de Paleoecología Humana i Evolució Social (IPHES), Zona Educacional 4, Campus Sescelades URV (Edifici W3), 43007 Tarragona, Spain; Área de Prehistòria, Universitat Rovira i Virgili. Facultat de Lletres, Avda Catalunya 35, 43002 Tarragona, Spain.
M. Arlegi
Departamento de Estratigrafía y Paleontología, Euskal Herriko Unibertsitatea, UPV/EHU. Barrio Sarriena s/n, 48940 Leioa, Spain; Université de Bordeaux, UMR PACEA / 5199, Université Bordeaux 1, avenue des Facultés, 33405 Talence cedex, France.
A. Gómez-Olivencia
Departamento de Estratigrafía y Paleontología, Euskal Herriko Unibertsitatea, UPV/EHU. Barrio Sarriena s/n, 48940 Leioa, Spain; Sociedad de Ciencias Aranzadi, Zorroagagaina 11, 20014 Donostia-San Sebastián, Spain.
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 in fossil contexts during the Pleistocene. The origin of the small-mammal assemblage is unclear, but some 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 well as happens with other larger species of mammals. The nebulous origin of the assemblage limits the paleocological interpretation, but the presence of alpine-subalpine meadows is described, associated to cold and wet climate.
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