首页 | 本学科首页   官方微博 | 高级检索  
     


Tremadoc (earliest Ordovician) brachiopods from Purmamarca and the Sierra de Mojotoro, Cordillera Oriental of northwestern Argentina
Authors:Juan L Benedetto  Paola A Carrasco
Affiliation:
  • a CONICET, Cátedra de estratigrafía y geología histórica, universidad nacional de Córdoba. Av. Vélez Sarsfield 299, 5000, Córdoba, Argentina
  • b Escuela de biología, universidad nacional de Córdoba. Av. Vélez Sarsfield 299, 5000, Córdoba, Argentina
  • Abstract:The Late Tremadoc storm-dominated shoreface to inner platform deposits exposed west of the Purmamarca village (Coquena Formation) contain a considerably more diverse brachiopod fauna than previously reported. Coquinite horizons from the lower heterolitic succession have yielded monospecific associations of Nanorthis purmamarcaensis nov. sp. (formerly assigned to N. christianiae KJERULF), which is also reported from the Late Tremadoc rocks of the Cerro San Bernardo area. The fine-grained Upper Member of the Coquena Formation contains a more diverse fauna composed by Nanorthis brachymyaria nov. sp., Astraborthis quebradensis nov. sp. and the new plectorthid genus Lipanorthis (type species L. andinus nov. sp.). A different species of Lipanorthis (L. santalaurae nov. sp.) from the Mid Tremadoc Floresta Formation of the Sierra de Mojotoro is also described.
    Keywords:Brachiopods   Early Ordovician   Tremadocian   Cordillera Oriental   Northwestern Argentina
    本文献已被 ScienceDirect 等数据库收录!
    设为首页 | 免责声明 | 关于勤云 | 加入收藏

    Copyright©北京勤云科技发展有限公司  京ICP备09084417号