Eocene primates of south america and the african origins. New world monkeys are the nonhuman primates of south and central america. Studies carried out over the past two decades show that many platyrrhine new world monkeys have polymorphic color vision. The platyrrhine primates, or new world monkeys, are immigrant mammals whose fossil record comes from tertiary and quaternary sediments of south america and the caribbean greater antilles 1,2. It is now well known that the concept of drifting continents became an estab lished theory during the 1960s. Quizlet flashcards, activities and games help you improve your grades. In this longawaited work, philip hershkovitz provides the most thorough and comprehensive treatise ever published on new world monkeys. Platyrrhine definition is of, relating to, or being any of a division platyrrhina of arboreal new world monkeys characterized by a broad nasal septum, usually 36 teeth, and often a prehensile tail. Not long after this revolution in the earth sciences, researchers began applying the continental drift model to problems in historical biogeography. Because almost all of their evolutionary history took place on the island continent of south america without competition. This condition results from the sorting of allelic versions of xchromosome cone opsin genes at a single gene site, yielding a mixture of dichromatic and trichromatic phenotypes in the population. A perspective on color vision in platyrrhine monkeys. A second group of primates may have rafted from africa to.
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