The role of new Iberian finds in understanding European Eocene mammalian paleobiogeography


  • A. BADIOLA KORTABITARTE Universidad de Zaragoza, Facultad de Ciencias, Departamento de Ciencias de la Tierra, Área de Paleontología. Pedro Cerbuna, 12, 50009 Zaragoza, Spain.
  • L. CHECA Institut de Paleontologia Dr. M. Crusafont de Sabadell. Escola Industrial, 23, 08201 Sabadell, Spain.
  • M.A. CUESTA RUIZ-COLMENARES Universidad de Salamanca, Facultad de Ciencias, Departamento de Geología. Plaza de los Caídos, s/n, 37008 Salamanca, Spain.
  • R. QUER Institut de Paleontologia Dr. M. Crusafont de Sabadell. Escola Industrial, 23, 08201 Sabadell, Spain.
  • J.J. HOOKER The Natural History Museum, Palaeontology Department. Cromwell Road, London SW7 5BD, U.K.
  • H. ASTIBIA Euskal Herriko Unibertsitatea/UPV, Zientzia eta Teknologia Fakultatea, Estratigrafia eta Paleontologia Saila. Sarriena Auzoa, 48940 Leioa, Spain.



Mammalia, Eocene, Endemism, Dispersal, Iberian Peninsula


This paper summarizes the new Eocene mammalian discoveries in western and northeastern Iberia and analyses the paleobiological data they provide towards an understanding of the evolutionary and paleobiogeographic history of the Eocene mammalian faunas across Europe. Fifty-one mammalian taxa, of which nineteen are new, have been identified since the last synthesis on Eocene mammal faunas presented at the Paleogene biochronological congress that took place in Montpellier in 1997. The new taxa consist of eight rodents, three artiodactyls and eight perissodactyls. A period of isolation from the Central European Island, albeit with intermittent faunal exchange with the rest of Europe and with other continents (probably Asia and Africa), most likely caused the endemism of the Eocene mammal faunas of the Iberian Peninsula. Middle and Late Eocene mammalian faunas (mainly primates, rodents and perissodactyls) of the western and central Iberian basins (Duero, Almazán, Oviedo and Miranda-Trebiño Basins) were clearly different from those of the Southern Pyrenean Basins and the rest of Europe. The special paleoecological conditions of western Iberia seem to have been one of the main causes of this faunal differentiation. The Iberian Peninsula could have played an important role as one of the dispersal routes for some Eocene mammal faunas that appeared in the Central European Island during the Middle and Late Eocene through two intra-Eocene faunal turnovers involving immigrations.