Late Miocene freshwater mussels from the intermontane Chota Basin, northern Ecuadorean Andes

Edwin-Alberto Cadena, Ismael Casado-Ferrer

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    Abstract

    Prior to the development of the modern Amazonian drainage network during the Late Miocene-Early Pliocene,
    large areas of western Amazonia may have been occupied by an extensive lacustrine and wetland environment
    known as the Pebas and Acre systems. These depositional systems are thought to have formed in response to
    foreland subsidence east of the uplifting Andes. Based on the occurrence at a present-day elevation of 1600m of
    fossil pearly freshwater mussels of the genus Anodontites (indet. species) in intermontane Chota Basin of northern
    Ecuador (the westernmost South American fossil record for this genus), we discuss their potential implications
    for understanding of westernmost limit of the Miocene wetland ecosystem and consequently a later timing for
    the regional uplift of the Eastern Cordillera.
    Translated title of the contributionMoluscos de agua dulce del Mioceno tardío de la cuenca intermontana del Chota, norte de los Andes Ecuatorianos
    Original languageEnglish
    Pages (from-to)39
    Number of pages46
    JournalJournal of South American Earth Sciences
    Volume89
    DOIs
    StatePublished - Jan 2019

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