%0 Journal Article
%T El g¨¦nero Cymatoceras (Nautilida) en el Cret¨¢cico Inferior de la Cuenca de Atacama, norte de Chile The genus Cymatoceras (Nautilida) in the Lower Cretaceous of the Atacama Basin, northern Chile
%A Marcela Cichowolski
%A Francisco A. Mourgues
%A Ernesto P¨¦rez d'A
%J Revista geol¨®gica de Chile
%D 2004
%I Scientific Electronic Library Online
%X Se describen restos fragmentarios de naut¨ªlidos del g¨¦nero Cymatoceras Hyatt, provenientes de estratos barremianos de la Cuenca de Atacama, norte de Chile. Los espec¨ªmenes corresponden a dos taxones: Cymatoceras sp. del Barremiano tard¨ªo alto, cuya preservaci¨®n es deficiente, aunque su tipo de ornamentaci¨®n, con costillas gruesas y un seno ventral muy marcado, es s¨®lo conocida, hasta el momento, en este tax¨®n y Cymatoceras cf. perstriatum (Steuer), del Barremiano tard¨ªo. El material chileno es comparado, principalmente, con taxones de Cymatoceras presentes en las cuencas Neuquina y Austral, en Argentina. Fragmentary remains of nautilids assigned to the genus Cymatoceras Hyatt, found in Barremian strata at the Atacama Basin, northern Chile, are described. The specimens can be divided into two taxa: Cymatoceras sp., from the late Upper Barremian, that has a poor preservation, but at the moment its ornamentation type, with coarse ribs with a marked ventral sinus, is only known from this taxon, and Cymatoceras cf. perstriatum (Steuer), from the Upper Barremian. The Chilean material is mainly compared with Cymatoceras taxa present at the Neuqu¨¦n and Austral basins, in Argentina.
%K Naut¨ªlidos
%K Cymatoceras
%K Cret¨¢cico Inferior
%K Cuenca de Atacama
%K Norte de Chile
%K Nautilids
%K Cymatoceras
%K Lower Cretaceous
%K Atacama Basin
%K Northern Chile
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082004000100007