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    Early-Middle Ordovician graptolites from the Argentine Puna: quantitative paleobiogeographic analysis based on a systematic revision by Lo Valvo, Gerardo A., Herrera Sánchez, Nexxys C., Toro, Blanca A.

    Published 2020
    “…This taxonomic analysis confirms the occurrence of twenty-three taxa in the studied region, from which S. praecursor, B. extremus and E. pusillus were not previously documented in South America. Additionally, it contributes to the clarification of the faunal graptolite affinities earlier postulated for the Northwestern Argentina…”
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