UN AMONITE HETEROMORFO (SPIROCERATIDAE) DEL BAYOCIANO SUPERIOR DEL PASO DEL ESPINACITO, SAN JUAN, ARGENTINA

Authors

  • M. Beatriz Aguirre Urreta
  • P. Pamela Alvarez

Abstract

AN HETEROMORPHOUS AMMONITE (SPIROCERATIDAE) OF UPPER BAJOCIAN AGE FROM PASO DEL ESPINACITO, SAN JUAN, ARGENTINA. The species Spiroceras orbignyi (Baugier y Sauzé) is recorded from the upper levels of the Los Patillos Formation in the Paso del Espinacito area, Principal Cordillera of San Juan. S. orbignyi shows a widespread geographic distribution but is stratigraphically restricted to the Upper Bajocian. In the local ammonoid zonation it can be placed in the Megasphaeroceras magnum Assemblage zone, which is partially equivalent to the Upper Bajocian Submeditarrean Subfurcatum(=Niortense) and Garantiana zones. This finding represents the first record of the genus Spiroceras from Argentina.

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Published

2013-12-16

Issue

Vol. 30 No. 2

Section

Articles

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How to Cite

UN AMONITE HETEROMORFO (SPIROCERATIDAE) DEL BAYOCIANO SUPERIOR DEL PASO DEL ESPINACITO, SAN JUAN, ARGENTINA. (2013). Ameghiniana, 30(2), 129-134. https://ameghiniana.org.ar/index.php/ameghiniana/article/view/2145