Bulletin of the Kitakyushu Museum of Natural History and Human History, Series A (Natural History)
Online ISSN : 2435-7545
Print ISSN : 1348-2653
Special Issue on Coelacanths
The skeleton and the mineralized tissues of the living coelacanths
François J. MEUNIERCamila CUPELLOGaël CLÉMENT
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RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS

2019 Volume 17 Pages 37-48

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Abstract

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.

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