The stratigraphical paleontology of the Tertiary non-marine sediments of Ecuador

Resumen

The stratigraphy of all the Andean Tertiary non-marine basins of Ecuador is described. The rich molluscan fauna (30 species of molluscs have now been identified) has been thoroughly revised and three new species described -Diplodon (Ecuudorea) bristowi, Neritina loyolaensis , Paleoancidosa kennerleyi. The stratigraphical position of the previously described Ecuadorian faunas has been reinterpreted. Half of the species have been recorded from localities outside Ecuador, and with this evidence the chronostratigraphy of the non-Ecuadorian deposits has been critically reviewed.