Cainozoic Research, 3-18, 2006 4(1-2), pp. February An Early Miocene elasmobranch fauna from the Navidad Formation, Central Chile, South America ³* Mario+E. Suarez Alfonso Encinas² & David Ward ¹, 'Museo Paleontoldgico de Caldera, Cousino, 695, Caldera, Atacama, Chile,
[email protected] 2 Departamento de Geologia. Universidad de Chile, Plaza Ercilla 803, Santiago Chile.
[email protected] J David J. Kent ME4 4AW UK. Ward, School of Earth Sciences, University of Greenwich, Chatham Maritime, Address for correspon- dence: Crofton Court, 81 Crofton Lane, Orpington, Kent BR5 1HB, UK. E-mail:
[email protected]. [* corresponding author] Received 5 March 2003; revised version accepted 12 January 2005 A rich elasmobranch assemblage is reported from the Early Neogenemarine sediments ofthe lower member of the NavidadFormation, Central Chile. The fauna comprise Squalus sp., Pristiophorus sp., Heterodontus sp., Megascyliorhinus trelewensis. Carcharias cuspi- data, Isurus hastalis, Carcharoides and Cal- Odontaspisferox, oxyirinchus,Isurus hastalis, Cosmopolitodus totuserratus, Myliobatis sp. for the the Miocene The of lorhinchus sp., all ofwhich are reported first time in Early ofChile. presence Carcharoides totuserratus sup- the Miocene for the lower ofthe basal Navidad Formation. The Chilean fossil elasmobranch fauna is ports Early age part representedby deep water and shallow water taxa, which probably were mixed in a submarine fan. Certain taxa suggest warm-temperate waters. The Early Miocene fauna from the Navidad Formation show affinities with other faunas previously reported from the Late Paleogene and Neogene of Argentina and New Zealand. Se describe rica asociacion de fosiles veniente de los sedimentos marines del Inferior de la Formación una elasmobranquios pro Neogeno central.