The stratigraphic distribution is given for 35 ostracod species from the lower Miocene of the San Lorenzo formation and from the lower and middle Miocene of the Pozon formation, eastern Falcon. Their ranges are compared with those in equivalent biostratigraphic zones in Trinidad. Two new species, Krithe lambi and Acanthocythereis? kugleri and two new subspecies, Trachyleberis bermudezi crebripustulosa and Costa variabilocostata muhlemanni are described. Krithe elongata is given a new name, Krithe prolixa.

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