Odostomia nuttalli spec. nov. and O. cotuhensis spec. nov. are described from the Miocene Pebas Formation of Peruvian and Colombian Amazonia. A third pyramidellid snail is also diagnosed. These species are indicators for marine influence in the late Middle to early Late Miocene of Western Amazonia. Some ecological implications are discussed.

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Nederlandse Malacologische Vereniging

J.J. van Aartsen, & F.P. Wesselingh. (2000). New Odostomia species (Gastropoda, Heterobranchia, Pyramidellidae) from the Miocene Pebas Formation of Western Amazonia (Peru, Colombia). Basteria, 64(4/6), 165–170.