A heteromorphous ammonite (Spiroceratidae) of Upper Bajocian age from Paso del Espinacito, San Juan, Argentina
The species Spiroceras orbignyi (Baugier y Sauze) 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 th...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00027014_v30_n2_p129_AguirreUrreta |
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| Sumario: | The species Spiroceras orbignyi (Baugier y Sauze) 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 Submediterrean Subfurcatum (=Niortense) and Garantiana zones. This finding represents the first record of the genus Spiroceras from Argentina. -English summary |
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