Evolution, MolecularPhylogenyDirected Molecular EvolutionMolecular Sequence DataSelection, GeneticSpecies SpecificitySequence Analysis, DNAModels, GeneticCultural EvolutionGenetic VariationBase SequenceAmino Acid SequenceSequence AlignmentAdaptation, BiologicalClonal EvolutionMultigene FamilyMutationPrimatesBase CompositionFossilsGenomeGastrointestinal Contents