Abstract
Phylogenetic hypotheses for the Old World monkey tribe Papionini based on molecular data are incongruent with those inferred from previous morphological analyses. Morphologists have often inferred a close relationship between Mandrillus and Papio based on their overall similarity. Theropithecus has been variously proposed to be either quite distantly related to these two genera, their sister taxon, or anywhere in between. Molecular and chromosomal analyses on the other hand unambiguously group Theropithecus and Papio together to the exclusion of Mandrillus. Additionally, molecular and chromosomal analyses reveal that mangabeys (Cerocebus) are paraphyletic. Morphologists have acknowledged this possibility resurrecting the genus name Lophocebus for one group of mangabeys. A review and reanalysis of the morphological characters put forth by various researchers find little to contradict the consensus phylogeny derived from analysis of chromosomal banding, nuclear RNA restriction mapping, alpha and beta hemoglobin sequences, albumin and transferrin microcomplement fixation, DNA-DNA hybridization, repetitive DNA patterns, immunodiffusion, hemoglobin and adenylate kinase isozymes, and mitochondrial cytochrome oxidase subunit II DNA sequences.
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