Naturwissenschaften

, 98:815 | Cite as

A Phororhacoid bird from the Eocene of Africa

  • Cécile Mourer-Chauviré
  • Rodolphe Tabuce
  • M’hammed Mahboubi
  • Mohammed Adaci
  • Mustapha Bensalah
Original Paper

Abstract

The bird fossil record is globally scarce in Africa. The early Tertiary evolution of terrestrial birds is virtually unknown in that continent. Here, we report on a femur of a large terrestrial new genus discovered from the early or early middle Eocene (between ∼52 and 46 Ma) of south-western Algeria. This femur shows all the morphological features of the Phororhacoidea, the so-called Terror Birds. Most of the phororhacoids were indeed large, or even gigantic, flightless predators or scavengers with no close modern analogs. It is likely that this extinct group originated in South America, where they are known from the late Paleocene to the late Pleistocene (∼59 to 0.01 Ma). The presence of a phororhacoid bird in Africa cannot be explained by a vicariant mechanism because these birds first appeared in South America well after the onset of the mid-Cretaceous Gondwana break up (∼100 million years old). Here, we propose two hypotheses to account for this occurrence, either an early dispersal of small members of this group, which were still able of a limited flight, or a transoceanic migration of flightless birds from South America to Africa during the Paleocene or earliest Eocene. Paleogeographic reconstructions of the South Atlantic Ocean suggest the existence of several islands of considerable size between South America and Africa during the early Tertiary, which could have helped a transatlantic dispersal of phororhacoids.

Keywords

Aves Eocene Algeria South America Paleobiogeography Transatlantic dispersal 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Cécile Mourer-Chauviré
    • 1
  • Rodolphe Tabuce
    • 2
  • M’hammed Mahboubi
    • 3
  • Mohammed Adaci
    • 4
  • Mustapha Bensalah
    • 4
  1. 1.Laboratoire de Géologie de LyonUniversité de Lyon, Université Lyon 1, CNRS, UMR 5276Villeurbanne CedexFrance
  2. 2.Institut des Sciences de l’ÉvolutionUMR 5554, cc064, Université Montpellier IIMontpellier Cedex 05France
  3. 3.Laboratoire de Paléontologie Stratigraphique et PaléoenvironnementUniversité d’OranEl M’naouerAlgeria
  4. 4.Laboratoire de Recherche n° 25, Département des Sciences de la TerreUniversité Abou Bekr BelkaïdTlemcenAlgeria

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