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Auteur (up) Dutel, H.; Herrel, A.; Clement, G.; Herbin, M. openurl 
  Titre A reevaluation of the anatomy of the jaw-closing system in the extant coelacanth Latimeria chalumnae Type Article scientifique
  Année 2013 Publication Naturwissenschaften Revue Abrégée  
  Volume 100 Numéro 11 Pages 1007-1022  
  Mots-Clés  
  Résumé The coelacanth Latimeria is the only extant representative of the Actinistia, a group of sarcopterygian fishes that originated in the Devonian. Moreover, it is the only extant vertebrate in which the neurocranium is divided into an anterior and a posterior portion that articulate by means of an intracranial joint. This joint is thought to be highly mobile, allowing an elevation of the anterior portion of the skull during prey capture. Here we provide a new description of the skull and jaw-closing system in Latimeria chalumnae in order to better understand its skull mechanics during prey capture. Based on a dissection and the CT scanning of an adult coelacanth, we provide a detailed description of the musculature and ligaments of the jaw system. We show that the m. adductor mandibulae is more complex than previously reported. We demonstrate that the basicranial muscle inserts more anteriorly than has been described previously, which has implications for its function. Moreover, the anterior insertion of the basicranial muscle does not correspond to the posterior tip of the tooth plate covering the parasphenoid, questioning previous inferences made on fossil coelacanths and other sarcopterygian fishes. Strong ligaments connect the anterior and the posterior portions of the skull at the level of the intracranial joint, as well as the notochord a  
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  Numéro d'Appel MNHN-CNRS @ hackert @ collection 82  
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