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Phylogeny and data from 5 primate species. The 5 species (from left to right: Homo sapiens, Pongo pygmaeus, Macaca mulatta, Ateles geoffroyi, Galago senegalensis) are presumed to share a common ancestor 58 Ma. Branch lengths are reported as fractions of 58 million years. Below each species, its mean weight (in kilograms) and maximum longevity (in years) are shown. Example taken from Lynch (1991).
