Abstract
Nucleotide sequences, each spanning ∼7 kb of the contiguous γ1and γ2globin genomic loci, were determined for seven species representing all extant genera (Ateles, Lagothrix, Brachyteles,andAlouatta) of the New World monkey subfamily Atelinae. After aligning these seven ateline sequences with outgroup sequences from several other primate (non-ateline) genera, they were analyzed by maximum parsimony, maximum likelihood, and neighbor-joining algorithms. All three analyzes estimated the same phylogenetic relationships: {Alouatta[Ateles(Brachyteles, Lagothrix)]}.BrachytelesandLagothrixare sister-groups supported by 100% of bootstrap replications in the parsimony analyses.Atelesjoins this clade, followed by the basal genusAlouatta;these joinings were strongly supported, again with 100% bootstrap values. This cladistic pattern for the four ateline genera is congruent with that obtained in previous studies utilizing ϵ-globin, IRBP, and G6PD nuclear genomic sequences as well as mitochondrial COII sequences. Because the number of aligned nucleotide positions is much larger in the present dataset than in any of these other datasets, much stronger support was obtained for the cladistic classification that divides subfamily Atelinae into tribes Alouattini (Alouatta) and Atelini, while the latter divides into subtribes Atelina (Ateles) and Brachytelina (BrachytelesandLagothrix).
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