Abstract
AbstractWe have analysed a newly exposed conodont association from the Santa Gertrudis Formation in the Mojotoro Range, Eastern Cordillera of Salta province, Argentina. The key speciesBaltoniodus triangularis(Lindström),Trapezognathus quadrangulum(Lindström) andErraticodon patuCooper are present. A new species of the genusBaltoniodus(Baltoniodus cooperisp. nov.) and elements ofPeriodonaff.P. flabellumare included in this conodont study. The key conodontB. triangularisindicates an age of lower Dapingian (Middle Ordovician) for the bearing strata. This was also recognized in other localities of the Eastern Cordillera, allowing their correlation. The conodonts from the Santa Gertrudis Formation provide conclusive elements on palaeogeographic interpretation by sharing species with Baltoscandia, South China and Australia, suggesting strong faunal affinities with these provinces.
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