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Court, Nicholas; Jaeger, Jean-Jacques
(detail)
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1991 |
Anatomy of the periotic bone in the Eocene proboscidean Numidotherium koholense: an example of parallel evolution in the inner ear of tethytheres.
C.R. Acad. Sci. Paris 312, Sér. II: 559-565. 1 pl.
–French summ. Compares the cochlear foramina in an early proboscidean, Trichechus, and Prorastomus, concluding that a supposed tethythere synapomorphy was evolved in parallel in sirs. and proboscideans.
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Tabuce, Rodolphe; Marivaux, Laurent; Adaci, Mohammed; Bensalah, Mustapha; Hartenberger, Jean-Louis; Mahboubi, Mohammed; Mebrouk, Fateh; Tafforeau, Paul; Jaeger, Jean-Jacques
(detail)
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2007 |
Early Tertiary mammals from North Africa reinforce the molecular Afrotheria clade.
Proc. Royal Soc. B 274: 1159-1166. 5 figs. doi:10.1098/rspb.2006.0229 Feb. 28, 2007.
–ABSTRACT: The phylogenetic pattern and timing of the radiation of mammals, especially the geographical origins of major crown clades, are areas of controversy among molecular biologists, morphologists and palaeontologists. Molecular phylogeneticists have identified an Afrotheria clade, which includes several taxa as different as tenrecs (Tenrecidae), golden moles (Chrysochloridae), elephant-shrews (Macroscelididae), aardvarks (Tubulidentata) and paenungulates (elephants, sea cows and hyracoids). Molecular data also suggest a Cretaceous African origin for Afrotheria within Placentalia followed by a long period of endemic evolution on the Afro-Arabian continent after the mid-Cretaceous Gondwanan breakup (approx. 105–25 Myr ago). However, there was no morphological support for such a natural grouping so far. Here, we report new dental and postcranial evidence of Eocene stem hyrax and macroscelidid from North Africa that, for the first time, provides a congruent phylogenetic view with the molecular Afrotheria clade. These new fossils imply, however, substantial changes regarding the historical biogeography of afrotheres. Their long period of isolation in Africa, as assumed by molecular inferences, is now to be reconsidered inasmuch as Eocene paenungulates and elephant-shrews are here found to be related to some Early Tertiary Euramerican 'hyopsodontid condylarths' (archaic hoofed mammals). As a result, stem members of afrotherian clades are not strictly African but also include some Early Paleogene Holarctic mammals.
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Coster, Pauline M. C.; Beard, K. Christopher; Salem, Mustafa J.; Chaimanee, Yaowalak; Brunet, Michel; Jaeger, Jean-Jacques
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2015 |
A new early Oligocene mammal fauna from the Sirt Basin, central Libya: biostratigraphic and paleobiogeographic implications.
Journal of African Earth Sciences 104: 43-55. 4 tabs. 7 figs. DOI: 10.1016/j.jafrearsci.2015.01.006 Publ. online Jan. 28, 2015.
–Illustrates a single indeterminate sir. rib fragment (51-52; Fig. 6).
ABSTRACT: We report the discovery of a new early Oligocene vertebrate fauna from the vicinity of Zallah Oasis in the Sirt Basin of central Libya. The Zallah Incision local fauna has been recovered from the base of a fluvial channel within a rock unit that has been mapped as ''Continental and Transitional Marine Deposits.'' This rock unit has produced fossil vertebrates sporadically since the 1960s, but the Zallah Incision local fauna is the most diverse assemblage of fossil mammals currently known from this unit. In addition to lower vertebrates, the fauna includes an indeterminate sirenian, the anthracothere Bothriogenys, a new species of the hyracoid genus Thyrohyrax, new species of the hystricognathous rodent genera Metaphiomys and Neophiomys, Metaphiomys schaubi, and a new species of the parapithecid primate genus Apidium. The Zallah Incision local fauna from Libya appears to be close in age to Fayum quarries V and G in the Jebel Qatrani Formation of Egypt and the Taqah locality in the Ashawq Formation of Oman. Considered together, these early Oligocene faunas support a modest level of faunal provincialism across the northern part of Afro-Arabia during the early Oligocene.
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Bibliography and Index of the Sirenia and Desmostylia 