Blog
About

32
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      A Fish Assemblage from the Middle Eocene from Libya (Dur At-Talah) and the Earliest Record of Modern African Fish Genera

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          In the early nineteen sixties, Arambourg and Magnier found some freshwater fish (i.e., Polypterus sp., Siluriformes indet. and Lates sp.) mixed with marine members in an Eocene vertebrate assemblage at Gebel Coquin, in the southern Libyan Desert. This locality, aged ca 37–39Ma and now known under the name of Dur At-Talah, has been recently excavated. A new fish assemblage, mostly composed of teeth, was collected by the Mission Paléontologique Franco-Libyenne. In this paper, we describe freshwater fish members including a dipnoan ( Protopterus sp.), and several actinopterygians: bichir ( Polypterus sp.), aba fish ( Gymnarchus sp.), several catfishes ( Chrysichthys sp. and a mochokid indet.), several characiforms (including the tiger fish Hydrocynus sp., and one or two alestin-like fish), and perciforms (including the snake-head fish Parachanna sp. and at least one cichlid). Together with the fossiliferous outcrops at Birket Qarun in Egypt, the Libyan site at Dur At-Talah reduces a 10-Ma chronological gap in the fossil record of African freshwater fish. Their fish assemblages overlap in their composition and thus constitute a rather homogenous, original and significant amount of new elements regarding the Paleogene African ichthyofauna. This supports the establishment of the modern African freshwater fish fauna during this time period because these sites mostly contain the earliest members known in modern genera.

          Related collections

          Most cited references 1

          • Record: found
          • Abstract: found
          • Article: not found

          Late middle Eocene epoch of Libya yields earliest known radiation of African anthropoids.

          Reconstructing the early evolutionary history of anthropoid primates is hindered by a lack of consensus on both the timing and biogeography of anthropoid origins. Some prefer an ancient (Cretaceous) origin for anthropoids in Africa or some other Gondwanan landmass, whereas others advocate a more recent (early Cenozoic) origin for anthropoids in Asia, with subsequent dispersal of one or more early anthropoid taxa to Africa. The oldest undoubted African anthropoid primates described so far are three species of the parapithecid Biretia from the late middle Eocene Bir El Ater locality of Algeria and the late Eocene BQ-2 site in the Fayum region of northern Egypt. Here we report the discovery of the oldest known diverse assemblage of African anthropoids from the late middle Eocene Dur At-Talah escarpment in central Libya. The primate assemblage from Dur At-Talah includes diminutive species pertaining to three higher-level anthropoid clades (Afrotarsiidae, Parapithecidae and Oligopithecidae) as well as a small species of the early strepsirhine primate Karanisia. The high taxonomic diversity of anthropoids at Dur At-Talah indicates either a much longer interval of anthropoid evolution in Africa than is currently documented in the fossil record or the nearly synchronous colonization of Africa by multiple anthropoid clades at some time during the middle Eocene epoch.
            Bookmark

            Author and article information

            Contributors
            Role: Editor
            Journal
            PLoS One
            PLoS ONE
            plos
            plosone
            PLoS ONE
            Public Library of Science (San Francisco, CA USA )
            1932-6203
            16 December 2015
            2015
            : 10
            : 12
            Affiliations
            [1 ]Institut de Paléoprimatologie, Paléontologie Humaine: Évolution et Paléoenvironnents (iPHEP) - UMR CNRS 7262, Université de Poitiers, Poitiers, France
            [2 ]Institut des Sciences de l'Évolution de Montpellier (ISE-m) - UMR5554, Université Montpellier 2, Montpellier, France
            [3 ]Geology Department, University of Al-Fateh, Tripoli, Libya
            University of Oxford, UNITED KINGDOM
            Author notes

            Competing Interests: The authors have declared that no competing interests exist.

            Conceived and designed the experiments: OO. Performed the experiments: OO. Analyzed the data: OO AP HC SA. Contributed reagents/materials/analysis tools: XV. Wrote the paper: OO HC. Led the field work: MS JJJ.

            Article
            PONE-D-14-52960
            10.1371/journal.pone.0144358
            4684465
            26674637
            © 2015 Otero et al

            This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited

            Page count
            Figures: 11, Tables: 1, Pages: 19
            Product
            Funding
            This research was funded by the Agence Nationale pour la Recherche ( http://www.agence-nationale-recherche.fr/) programme EVAH, number ANR05-blan-0235.
            Categories
            Research Article
            Custom metadata
            All relevant data are within the paper.

            Uncategorized

            Comments

            Comment on this article