NEW BRACHIOPOD RECORDS AND CONSIDERATIONS ON THE TIVERTONIA-STREPTORHYNCHUS (MOSCOVIAN) AND COSTATUMULUS AMOSI (SAKMARIAN–ARTINSKIAN) FAUNAS FROM WESTERN ARGENTINA: THE KEY SECTIONS AT QUEBRADA AGUA DEL JAGÜEL AND QUEBRADA SANTA ELENA REVISITED

Authors

  • Arturo Cesar Taboada Laboratorio de Investigaciones en Evolución y Biodiversidad (LIEB), Facultad de Ciencias Naturales, Sede Esquel, Universidad Nacional de la Patagonia “San Juan Bosco” (UNPSJB)

DOI:

https://doi.org/10.5710/AMGH.11.12.2013.846

Keywords:

Western Argentina, Tivertonia-Streptorhynchus fauna, Costatumulus amosi fauna,

Abstract

The brachiopod Coolkilella aredesi sp. nov. and Calytrixia piersoni sp. nov. are proposed on the basis of specimens from the Del Salto, Río del Peñón and Agua del Jagüel formations. Their biostratigraphic implications are discussed together with new records of Septosyringothyris (Precosyringothyris) jaguelensis Lech and Streptorhynchus inaequiornatus Leanza at the top of the latter unit. The stratigraphic record, paleontological content and age of both the Tivertonia-Streptorhynchus assemblage (Moscovian) and the younger Costatumulus amosi fauna (Sakmarian–Artinskian) were reviewed and assessed based on outcrops at Quebrada Agua del Jagüel and Quebrada Santa Elena. Faunal content confirms the most recent stratigraphic, biostratigraphic and paleoclimatic frameworks. These a diachronic nature of the Agua del Jagüel and Cordón del Jagüel formations, supporting the absence of an early Permian glacial event in western Argentina.

Author Biography

  • Arturo Cesar Taboada, Laboratorio de Investigaciones en Evolución y Biodiversidad (LIEB), Facultad de Ciencias Naturales, Sede Esquel, Universidad Nacional de la Patagonia “San Juan Bosco” (UNPSJB)
    Investigador CONICET

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Published

2014-02-15

Issue

Vol. 51 No. 3 (2014)

Section

Articles

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How to Cite

NEW BRACHIOPOD RECORDS AND CONSIDERATIONS ON THE TIVERTONIA-STREPTORHYNCHUS (MOSCOVIAN) AND COSTATUMULUS AMOSI (SAKMARIAN–ARTINSKIAN) FAUNAS FROM WESTERN ARGENTINA: THE KEY SECTIONS AT QUEBRADA AGUA DEL JAGÜEL AND QUEBRADA SANTA ELENA REVISITED. (2014). Ameghiniana, 51(3), 226-242. https://doi.org/10.5710/AMGH.11.12.2013.846