The skeleton and the mineralized tissues of the living coelacanths

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  • MEUNIER François J.
    UMR 7208 (MNHN - Sorbonne Universités - Univ. Caen Normandie - Univ. Antilles – CNRS - IRD), BOREA, Département Adaptations du Vivant, Muséum national d'Histoire naturelle
  • CUPELLO Camila
    Departamento de Zoologia, Universidade do Estado do Rio de Janeiro
  • CLÉMENT Gaël
    UMR 7207 (MNHN–Sorbonne Université–CNRS), Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements, Département Origines & Evolution, Muséum national d'Histoire naturelle

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  • 現生シーラカンスの骨格と硬組織

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<p>The present overview of the histological studies on Latimeria mineralized tissues, since the discovery of the first living coelacanth in 1938, allows some anatomical and evolutionary considerations. It enlightens: i) a drastic reduction of cartilage to bone transformation processes during evolution; ii) the persistence of large volume of cartilage in the endoskeleton at adult stage; iii) the bony nature of the plates that surround the lung diverticle; iv) the presence of a developed process of spheritic mineralization in various skeletal organs: in teeth, in odontodes of the tegumentary skeleton (scales, fin rays), in scales at the interface between the external layer and the basal plate, as well as in lung bony plates.</p>

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