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Showing results for tags 'ocadia'.
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This rock is listed as "Ocadia messeliana" fossil turtle from Messel, but is obviously a septarian nodule (you can clearly recognise it by the patterns and by the fact that there isn't a shell). It is indeed at first glance very similar to a turtle, but is not.
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Alternative combination: Ocadia kehreri or Palaeoemis kehreri. Information from Prof. Walter Joyce (Université de Fribourg): "The literature contradicts itself how many species of geoemyd turtles there are in Messel and I had no time to make myself a more exact picture. Hervet (2004) writes that there are three species in three genera, Claude & Tong (2004) that it is only one species, and that the different species of Hervet (2004) are only growth stages. If you follow Claude & Tong (2004), your fossil is Palaeoemys kehreri. If you follow Hervet (2004), this animal is called Franciella messeliana." Identified by Prof. W. Joyce, Fribourg. References: Stäsche, K. (1928) Sumpfschildkröten aus hessischen Tertiärablagerungen. Abhandlungen der Hessischen Geologischen Landesanstalt zu Darmstadt, 8 (4): 1-72. Claude, J. & Tong H. (2004) EARLY EOCENE TESTUDINOID TURTLES FROM SAINT-PAPOUL, FRANCE, WITH COMMENTS ON THE EARLY EVOLUTION OF MODERN TESTUDINOIDEA. ORYCTOS, Vol. 5 : 3 - 45. Hervet, S. (2004) Systématique du groupe "Palaeochelys sensu lato – Mauremys" (Chelonii, Testudinoidea) du Tertiaire d'Europe occidentale: principaux résultats [Systematic of the "Palaeochelys sensu lato – Mauremys" group (Chelonii, Testudinoidea) from the Tertiary of Western Europe: principal results. Annales de Paléontologie 90(1):13-78.