Los arqueociatos del Cámbrico Inferior de Navalcastaño (Sierra Morena, Córdoba, España)sistemática y bioestratigrafía

Zusammenfassung

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.