81 research outputs found
DID TECTONIC ACTIVITY STIMULATE OLIGO–MIOCENE SPECIATION IN THE INDO-WEST PACIFIC?
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73573/1/j.1558-5646.2008.00399.x.pd
A New Horned Crocodile from the Plio-Pleistocene Hominid Sites at Olduvai Gorge, Tanzania
BACKGROUND: The fossil record reveals surprising crocodile diversity in the Neogene of Africa, but relationships with their living relatives and the biogeographic origins of the modern African crocodylian fauna are poorly understood. A Plio-Pleistocene crocodile from Olduvai Gorge, Tanzania, represents a new extinct species and shows that high crocodylian diversity in Africa persisted after the Miocene. It had prominent triangular "horns" over the ears and a relatively deep snout, these resemble those of the recently extinct Malagasy crocodile Voay robustus, but the new species lacks features found among osteolaemines and shares derived similarities with living species of Crocodylus. METHODOLOGY/PRINCIPAL FINDINGS: The holotype consists of a partial skull and skeleton and was collected on the surface between two tuffs dated to approximately 1.84 million years (Ma), in the same interval near the type localities for the hominids Homo habilis and Australopithecus boisei. It was compared with previously-collected material from Olduvai Gorge referable to the same species. Phylogenetic analysis places the new form within or adjacent to crown Crocodylus. CONCLUSIONS/SIGNIFICANCE: The new crocodile species was the largest predator encountered by our ancestors at Olduvai Gorge, as indicated by hominid specimens preserving crocodile bite marks from these sites. The new species also reinforces the emerging view of high crocodylian diversity throughout the Neogene, and it represents one of the few extinct species referable to crown genus Crocodylus
Profil en long du Nil et de ses principaux affluents
Fourtau René. Profil en long du Nil et de ses principaux affluents. In: Annales de Géographie, t. 28, n°155, 1919. p. 400
Les pluies aux environs du Caire
Fourtau René. Les pluies aux environs du Caire . In: Bulletin de l'Institut d'Egypte, tome 1, 1918. pp. 87-115
Notes sur quelques publications parues en 1899-1900 concernant la géologie et la paléontologie de l’Égypte
Fourtau René. Notes sur quelques publications parues en 1899-1900 concernant la géologie et la paléontologie de l’Égypte. In: Bulletin de l'institut égyptien, tome 1, 1900. pp. 241-256
Contribution à l’Etude des Echinides fossiles de la craie supérieure
Fourtau René. Contribution à l’Etude des Echinides fossiles de la craie supérieure. In: Bulletin de l'institut égyptien, tome 6, 1905. pp. 139-175
Etudes sur les vertébrés fossiles du Wadi Natroun
Fourtau René. Etudes sur les vertébrés fossiles du Wadi Natroun. In: Bulletin de l'Institut d'Egypte, tome 1, 1918. pp. 195-196
Notes sur les Echinides fossiles d’Egypte
Fourtau René. Notes sur les Echinides fossiles d’Egypte. In: Bulletin de l'institut égyptien, tome 5, 1904. pp. 121-140
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