The Middle Pleistocene coincides with an important climate change, from this time ahead, the 100ky glacial
cycles become a dominant feature. The opening of the landscapes, and a series of dispersal events of prairie
taxa as the microtines, cricetids, ungulates and carnivores as well as Homo heidelbergensis mark this event.
The rareness of fossil faunas of this age makes the Cueva de los Huesos de Obon one of the most important
localities of this age in Aragon. Here we provide the first account on the Middle Pleistocene mammals from
the Cueva de los Huesos, Obon, Teruel. The fossil mammalian species recovered in Obon are: Canis lupus,
Vulpes vulpes, Felis sylvestris, Meles meles Hyaenidae and Carnivora indet., Stephanorhinus cf. hemitoechus,
Equus sp. Gr. E. mosbachensis, Cervus elaphus priscus, Hemitragus sp. Erinaceus europaeus, Rhinolophus
sp., Allocricetus bursae correzensis, Apodemus sp. This association is somewhat similar to that in the Trinchera
Galería, Trinchera Dolina 8b-11 and Sima de los Huesos localities of Atapuerca