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White-footed tamarin
The white-footed tamarin (''Saguinus leucopus'') is a tamarin species endemic to Colombia.
==Taxonomy and phylogeny==
Some authorities, such as Thorington (1976), posit that ''S. leucopus'' is very closely related to the cotton-top tamarin, ''Saguinus oedipus''. Other analyses made by Hernandez-Camacho & Cooper (1976), and later Mittermeier and Coimbra-Filho in 1981,〔 and finally Grooves (2001) This view is supported by Hanihara & Natoria’s multivariate analysis of toothcomb dental morphology (1987) and by Skinner’s work in 1991, which found high similarity between ''S. oedipus'' and ''S. leucopus'' in 16 out of 17 morphological traits considered.〔 This is further supported by the transition from child to adult, during which the fur coloration changes take place and are similar between the two species. Philip Hershkovitz proposed that the divergence of the two species occurred in the Pleistocene at the height of the Atrato river, where it intersected the Cauca-Magdalena. At this time, the area was covered by a sea, which created a geographic barrier which caused this ancestral species to diverge from ''S. oedipus'' through the process of allopatric speciation. Today, the two species are principally separated by the Atrato river.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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