TRILOBITA: Los trilobites del Marianense (Cámbrico inferior) de Alanís (Sevilla), Suroeste de EspañaLos trilobites del Marianense (Cámbrico inferior) de Alanís (Sevilla), Suroeste de España
DOI:
https://doi.org/10.32870/dugesiana.v16i2.3930Keywords:
Alanís, Cámbrico Inferior, Capas de Saukianda, Marianiense, Tafonomía, Trilobites.Abstract
Este trabajo tiene un doble objetivo: por una parte se ofrece una breve reseña histórica de los principales investigadores que han colectado y estudiado los niveles fosilíferos de los yacimientos de Alanís de la Sierra en Sevilla (España), y por otra parte mostrar el registro fosilífero mas significativo de las denominadas “Capas de Saukianda” del Marianense (Cámbrico Inferior) de esos enclaves. Se trata de uno de los yacimientos con trilobites del Cámbrico Inferior de la Península Ibérica que reviste un especial interés tanto por las características de endemismo de sus trilobites como por los aspectos tafonómicos singulares presentes en los mismos. Dichos yacimientos de la localidad sevillana de Alanís muestran asociaciones de fósiles compuestas fundamentalmente por trilobites, equinodermos, braquiópodos y arqueociatos. La edad de estas pizarras fosilíferas es Marianiense, siendo uno de los más antiguos registros documentados de invertebrados marinos de la Península Ibérica relacionado con los yacimientos cámbricos portugueses de Vila Boim y los que se encuentran en el Norte de Marruecos. Los géneros de trilobites mas importantes que caracterizan este intervalo son: Delgadella, Serrodiscus, Perrector, Eops, Rinconia, Alanisia, Atops, Hicksia, Termierella, Lusatiops, Triangulaspis, Andalusiana, Saukianda y Gigantopygus.
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2015-09-22
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