Gil Bazán, E.2015-05-132015-05-131997http://hdl.handle.net/10272/10592The micromammals association of the TD5- TD6 levels is exclusive from the karstic complex of Atapuerca (Burgos, Spain). This association is characterized by the presence of arvicolids : Terricola gregaloides, Terricola huescarensis, Terricola subterraneus, Microtus brecciensis, Arvicola chalirei, Mimorriys savini, Pliomys episcopalis, together two new rodent species: Terricola seseae nov. sp. and Microtus iignani nov. sp.. This fauna seems to correspond to the transit Lower Pleistocene - Middle Pleistocene, with more than 780.000 years ago, near of Matuyama/ Brunhes boundaryspaAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Lower Pleistocene-Middle PleistoceneMicromammals associationTerricola seseae nov. spMicrotus Iignani nov. spAtapuercaLos micromamíferos del tránsito Pleistoceno inferior-medio de Atapuerca (Burgos,España). Implicaciones bioestratigráficas y evolutivasMicromammals from the lower-middle Pleistocene bocendary from Atapuerca (Burgos, Spain). Biostratigraphycal and evolutive implicationsjournal articleopen access