Primer registro fósil de Pliometanastes sp. (Mammalia, Xenarthra, Megalonychidae) para el Mioceno superior de Costa Rica, América Central. Una nueva pista en la comprensión del Pre-GABI

two lower molar teeth and a unique postcranial remain of pliometanastes cf. p. protistus hirschfeld & webb, 1968, are described from the san gerardo de limoncito locality (early hemphillian) in the curré formation near of the town of san vito, southern costa rica. this found changes our vision about the route of dispersion of the earliest south american mammals that reached north america and confirms the costa rican-panama island arc like the most effective path of migration in spite of the relatively broad ocean gaps.