%0 Journal Article
%T Un nuevo esp¨¦cimen de cocodrilo marino del Jur¨˘sico Medio del norte de Chile: revalidaci¨®n de Metriorhynchus westermanni (Crocodyliformes: Metriorhynchidae)
%A Gasparini
%A Zulma
%A Paulina-Carabajal
%A Ariana
%A Chong
%A Guillermo
%J Revista geol¨®gica de Chile
%D 2008
%I Scientific Electronic Library Online
%R 10.4067/S0716-02082008000200008
%X anew specimen of a callo vian marine crocodile (metriorhynchidae), found in the middle course of quebrada cherejara, sierra del medio, regi¨®n de antofagasta, chile, allows the revalidation of the species metriorhynchus westermanni gasparini. the analysis of the braincase and associated bones shows that the holotype ofmetriohrynchus westermanni is not a juvenile ofm casamiquelai gasparini and chong, as recently proposed. revalidation of m. westermanni is supported by several morphological differences such as frontal and parietal on a single plane, absence of medial depression on the interorbital section of the frontal, base of the supratemporal fossa flat and horizontal, internal nares drop-shaped with the base wider caudally and separated by a complete septum. the revalidation ofm westermanni increases the diversity of jurassic marine crocodiles in west gondwana, prevailing the chilean forms during the mddle jurassic.
%K crocodyliformes
%K metriorhynchidae
%K metriorhynchus westermanni
%K callovian
%K middle jurassic
%K northern chile.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0716-02082008000200008&lng=en&nrm=iso&tlng=en