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Bovid fossils constitute rare findings in the Cerro de los Batallones fossil sites. However, maxillar and mandibular remains of a juvenile individual of a large-sized bovid were discovered in Batallones-1. In the present work, we describe these fossils and assign them to the Eurpoean genus Austroportax (Sickenberg, 1829). We name these fossils as Austroportax sp. due to the lack of more diagnostic additional material belonging to this form.Los restos de bóvidos son excepcionalmente raros en los yacimientos del Cerro de los Batallones. Sin embargo, en Batallones-1 se han hallado restos mandibulares y maxilares de un individuo juvenil perteneciente a una especie de bóvido de talla grande. En el presente trabajo describimos estos fósiles y los asignamos al género europeo Austroportax (Sickenberg, 1829). Los fósiles quedan nombrados como Austroportax sp. debido a la ausencia de material diagnóstico adicional perteneciente a esta especie.

Several dental remains from the Early Miocene of Estrepouy (MN3, France) previously reported as Amphitragulus aurelianensis by Roman & Viret (1934) are described in this work and assigned to Andegameryx andegaviensis Ginsburg, 1971. The re-study of this material and the comparison with other remains of A. andegaviensis from several european localities of the early Miocene, including the type locality of the species, have permitted us to confirm the presence of A. andegaviensis in the ruminant fauna from Estrepouy.En esta nota describimos algunos de los restos del yacimiento del Mioceno inferior de Estrepouy (MN3, Francia) atribuidos por Roman & Viret (1934) a Amphitragulus aruelianensis, cambiando su asignación a Andegameryx andegaviensis Ginsburg, 1971. El reestudio del material y su comparación con los restos de A. andegaviensis de otras localidades europeas del Mioceno inferior, incluyendo la localidad tipo de la especie, permiten confirmar su presencia entre la fauna de rumiantes fósiles de Estrepouy.

Bovid fossils constitute rare findings in the Cerro de los Batallones fossil sites. However, maxillar and mandibular remains of a juvenile individual of a large-sized bovid were discovered in Batallones-1. In the present work, we describe these fossils and assign them to the Eurpoean genus Austroportax (Sickenberg, 1829). We name these fossils as Austroportax sp. due to the lack of more diagnostic additional material belonging to this form. Los restos de bóvidos son excepcionalmente raros en los yacimientos del Cerro de los Batallones. Sin embargo, en Batallones-1 se han hallado restos mandibulares y maxilares de un individuo juvenil perteneciente a una especie de bóvido de talla grande. En el presente trabajo describimos estos fósiles y los asignamos al género europeo Austroportax (Sickenberg, 1829). Los fósiles quedan nombrados como Austroportax sp. debido a la ausencia de material diagnóstico adicional perteneciente a esta especie.

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The Cerro de los Batallones (Los Batallones Butte) is located in the central-northern area of the Madrid Basin, central Spain. Nine vertebrates localities containing a large variety of mammals of Upper Vallesian Age (Late Miocene) have been found associated with the sediments forming the butte. From bottom to top, these sediments consist of magnesian lutite beds (Unit I), paleosols formed of sepiolite and opal (Unit II), and siliclastic, marlstone and carbonate beds (Unit III). The set of ERT profiles developed in Los Batallones Butte have demonstrate that electrical imaging techniques are an estimable tool for the characterization and prospecting of fossil sites developed in fine-grained siliciclastic sequences. These localities contain an exceptionally rich, varied and well-preserved vertebrate fauna together with invertebrate and plant fossils. Carnivore species are strikingly well represented at Batallones 1 and 3, and large herbivore species, such as mastodons, rhinoceros and giraffes, at Batallones 2, 4, 5 and 10. The taphonomical studies, together with the morphological features shown by the sedimentary fills of the mammal localities, permit an overall interpretation of these deposits as vertebrate traps. The study of these localities should offer a significant contribution to our understanding of the formation pattern of trap-like paleontological sites - which so far have been typically reported in karstic-type systems -, as well as an important source of paleobiological information about numerous vertebrate groups.

17 páginas, 4 figuras, 5 tablas., [ES] Este trabajo constituye un estudio preliminar de los restos de rumiantes fósiles hallados en el yacimiento del Mioceno inferior de La Encinilla (Colmenar Viejo, Madrid). La descripción morfológica de la dentición y del esqueleto postcraneal, así como el estudio métrico y comparativo con material procedente de localidades francesas y españolas de edad similar ha permitido constatar hasta el momento la presencia de dos formas de rumiantes Pecora en La Encinilla: Andegameryx sp. y un rumiante de mayor talla relacionado con Teruelia Moyá-Solá, 1987. Aunque la identificación en uno de los casos necesitaría confirmarse con más material, la presencia de estas dos formas en la Cuenca de Madrid ampliaría la distribución biogeográfica conocida para ambos taxones. La posición sistemática de Andegameryx y Teruelia permanece abierta a discusión, pero ambos géneros se diferencian de los Cervoidea del Mioceno inferior encontrados en Europa y la Península Ibérica, tales como Amphitragulus, Oriomeryx, Bedenomeryx o Dremotherium., [EN] This article is a preliminary study of the fossil ruminants found in the Early Miocene site of La Encinilla (Colmenar Viejo, Madrid). The morphological description of dentition and postcranial bones, along with the metrical and comparative study with material from localities of similar age in France and Spain has allowed us to confirm the presence of two Pecoran ruminants in La Encinilla: Andegameryx sp. and a larger species related to Teruelia Moyá-Solá, 1987. Although the identification in one of the cases should be confirmed with more material, the record in the Madrid Bassin would represent new information regarding the known biogeographical distribution of both taxa. The systematic position of Andegameryx and Teruelia is still under discussion, but both forms are clearly distinct from the Cervoidea ruminants found in Europe and the Iberian Peninsula at the same age, such as Amphitragulus, Oriomeryx, Bedenomeryx or Dremotherium., Este trabajo ha sido realizado durante el disfrute de una beca predoctoral de Formación de Personal Investigador por parte de uno de los autores, V. Quiralte, dentro del marco de los Proyectos de Investigación del Ministerio de Educación y Ciencia PB98-0513 y BTE2003-03001.

Six Upper Vallesian (Upper Miocene) fossil vertebrate sites have been found in the Cerro de los Batallones (Torrejón de Velasco, Madrid). These localities contain an exceptionally rich, varied and well-preserved vertebrate fauna. Carnivore species are strikingly well represented at Batallones 1 and 3, and large herbivore species, such as mastodons, rhinoceros and giraffes, are common in Batallones 2, 4 and 5. The mammalian association, together with the morphological features shown by the sedimentary fills of the mammal sites, enables an overall interpretation of these deposits as vertebrate traps. The study of these localities should offer a significant contribution to our understanding of the formation pattern of trap-like paleontological sites which so far have been typically reported in karstic-type systems. These new sites also will contribute to a better knowledge of some of the most scarce mammal groups in the Miocene fossil record

Six Upper Vallesian (Upper Miocene) fossil vertebrate sites have been found in the Cerro de los Batallones (Torrejón de Velasco, Madrid). These localities contain an exceptionally rich, varied and well-preserved vertebrate fauna. Carnivore species are strikingly well represented at Batallones 1 and 3, and large herbivore species, such as mastodons, rhinoceros and giraffes, are common in Batallones 2, 4 and 5. The mammalian association, together with the morphological features shown by the sedimentary fills of the mammal sites, enables an overall interpretation of these deposits as vertebrate traps. The study of these localities should offer a significant contribution to our understanding of the formation pattern of trap-like paleontological sites which so far have been typically reported in karstic-type systems. These new sites also will contribute to a better knowledge of some of the most scarce mammal groups in the Miocene fossil record