Publication: Los arqueociatos del Cámbrico Inferior de Navalcastaño (Sierra Morena, Córdoba, España): Sistemática y bioestratigrafía
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2008
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Real Sociedad Española de Historia Natural
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Abstract
El hallazgo de arqueociatos en la localidad de Navalcastaño se realizó en 1971, posteriormente en 1973 se recogió abundante material con arqueociatos del que se hizo un somero estudio y cuyos datos fueron incluidos en la Tesis Doctoral de uno de los autores (A.P.). En este trabajo se describe el conjunto del material recogido en 1973, 2006 y 2007, se analizan las microfacies carbonáticas en las que se encuentran, se propone la distribución estratigráfica de los taxones descritos y sus correlaciones con otras localidades españolas, del SO de Gondwana y de la placa Siberiana. Se describen y figuran 22 taxones de arqueociatos, entre ellos una especie nueva, Nochoroicyathus castanensis sp. nov. La asociación de taxones de género descrita en Navalcastaño está constituida por Anthomorpha, Cordobicyathus, Coscinocyathus, Dokidocyathus, Erismacoscinus, Fallocyathus?, Morenicyathus, Neoloculicyathus, Nochoroicyathus, Okulitchicyathus, Protopharetra, Rotundocyathus, Taylorcyathus y Urcyathus. La presencia de Anthomorpha en estos materiales nos permite asignarlos al Ovetense Superior, ya que este género es característico de las Zonas VI y VII de este piso en España, que en la escala de pisos rusos equivalen al Botomiense 1 y 2 (PEREJÓN, MORENO-EIRIS & MENÉNDEZ, 2006). De acuerdo con el conjunto de géneros identificados, asignamos la asociación de arqueociatos de Navalcastaño a la Zona VI de Arqueociatos de España, nivel más bajo de aparición de Anthomorpha en la Península Ibérica y en el SO de Gondwana.
The finding of archaeocyaths in the Navalcastaño locality occurred in 1971, followed by collection of abundant material with archaeocyaths in 1973, which was preliminarily studied and included in the Doctoral Thesis of one the authors (A. P.). All the material collected in 1973, 2006 and 2007 is described in the present paper, together with analyses of the carbonate microfacies in which they were found, the proposal of a stratigraphic distribution of the described taxa and their correlation with other Spanish, SW Gondwanan and Siberian Plate localities. Twenty-two archaeocyathan taxa are described and figured, among them a new species, Nochoroicyathus castanensis sp. nov. The association of taxa found in Navalcastaño is made up of the genera Anthomorpha, Cordobicyathus, Coscinocyathus, Dokidocyathus, Erismacoscinus, Fallocyathus?, Morenicyathus, Neoloculicyathus, Nochoroicyathus, Okulitchicyathus, Protopharetra, Rotundocyathus, Taylorcyathus and Urcyathus. The presence of the genus Anthomorpha in these materials allows us to assign the assemblage to the Late Ovetian, which is characteristic of Zones VI and VII in Spain, and equivalent to Botoman 1 and 2 in Siberia, according to the Russian zonation (PEREJÓN, MORENO-EIRIS & MENÉNDEZ, 2006). In accordance with the whole set of identified genera, we assign the archaeocyathan assemblage from Navalcastaño to the Spanish Archaeocyathan Zone VI, the lowest level for the appearance of Anthomorpha in the Iberian Peninsula and SW Gondwana.
The finding of archaeocyaths in the Navalcastaño locality occurred in 1971, followed by collection of abundant material with archaeocyaths in 1973, which was preliminarily studied and included in the Doctoral Thesis of one the authors (A. P.). All the material collected in 1973, 2006 and 2007 is described in the present paper, together with analyses of the carbonate microfacies in which they were found, the proposal of a stratigraphic distribution of the described taxa and their correlation with other Spanish, SW Gondwanan and Siberian Plate localities. Twenty-two archaeocyathan taxa are described and figured, among them a new species, Nochoroicyathus castanensis sp. nov. The association of taxa found in Navalcastaño is made up of the genera Anthomorpha, Cordobicyathus, Coscinocyathus, Dokidocyathus, Erismacoscinus, Fallocyathus?, Morenicyathus, Neoloculicyathus, Nochoroicyathus, Okulitchicyathus, Protopharetra, Rotundocyathus, Taylorcyathus and Urcyathus. The presence of the genus Anthomorpha in these materials allows us to assign the assemblage to the Late Ovetian, which is characteristic of Zones VI and VII in Spain, and equivalent to Botoman 1 and 2 in Siberia, according to the Russian zonation (PEREJÓN, MORENO-EIRIS & MENÉNDEZ, 2006). In accordance with the whole set of identified genera, we assign the archaeocyathan assemblage from Navalcastaño to the Spanish Archaeocyathan Zone VI, the lowest level for the appearance of Anthomorpha in the Iberian Peninsula and SW Gondwana.