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Mesoamerican Spider Monkeys: A Case Study

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Mesoamerican Spider Monkeys: A Case Study
The taxon of Mesoamerican spider monkeys (Ateles geoffroyi sensu lato), which are found throughout southern Mexico and Central America, is presumed to include nine species. The validity of the phylogenetic relationships and their proposed assignment into a taxon has been a source of controversy. An example of this would be the difficulty of determining whether Mesoamerican A. geoffroyi forms a separate clade from Atles fuscipes. In order to determine the phylogenetic relationship of these species, pelage color, cranial measurements and mtDNA sequence data were evaluated. The results were conflicting: pelage color and cranial measurements determined that they represented a distinct species whereas mtDNA determine that they were subspecies.
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