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  • Title: Geophagy in new world monkeys (Platyrrhini): ecological and geographic patterns.
    Author: Ferrari SF, Veiga LM, Urbani B.
    Journal: Folia Primatol (Basel); 2008; 79(5):402-15. PubMed ID: 18587239.
    Abstract:
    Geophagy has been recorded in an increasing number of New World monkeys (Platyrrhini) over recent years, permitting a tentative analysis of ecological patterns. While geophagy has now been recorded in species representing all 4 platyrrhine families and a majority of genera, there is a marked tendency for it to occur in the larger-bodied Pitheciidae and Atelidae. Howlers (Alouatta) are responsible for almost a third of reports, which are concentrated in the more frugivorous species, Alouatta belzebul and Alouatta seniculus. Geophagy may also be relatively common in the spider monkeys (Ateles) and the pitheciids, which are specialised frugivores and seed predators, respectively. An overview of the available data points to a marked Amazonian bias, allowing for geographical differences in the number of species and field studies. This pattern is demonstrated most emphatically by Alouatta, for which there are almost as many reports as field studies in the Amazon basin, in stark contrast with Central American sites, which have a long tradition of fieldwork, but no published records of geophagy. There are also relatively few reports from the Brazilian Atlantic forest. Despite the growth in reports, and the patterns identified here, the functional aspects of geophagy in the platyrrhines still remain unclear.
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