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December 2018
Vol 41-2
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Print ISSN: 0031-0247
Online ISSN: 2274-0333
Frequency: biannual

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L'anatomie de Lyrocephaliscus euri (wiman), Trématosaure du Trias inférieur du Spitsberg : arrière-crâne, squelette axial et ceinture scapulaire.
Jean-Michel Mazin and Philippe Janvier
Keywords: skull anatomy; Spitsbergen; Trematosaurs; Trias
 
  Abstract

    The formic acid preparation of a nodule collected from the Lower Triassic of Spitsbergen, and containing a skull with some associated postcranial elements of Lyrocephaliscus euri (WIMAN), precises and enriches previous descriptions of the reputedly well-known trematosaur. lt permits more detailed descriptions of the occipital region, of the course of the carotid arteries and collateral vessels, and refutes the previous description of a stapedial foramen in trematosaurs. The discovery of pleurocentres associated with the other vertebral components confirms the primitive rhachitomy of trematosaurs. 


  Article infos

Published in Vol. 13, Fasc. 1-2 (1983)

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