Sex chromosome phylogenetics indicate a single transition to terrestriality in the guenons (tribe Cercopithecini)

Anthony J. Tosi, Don J. Melnick, Todd Disotell

    Research output: Contribution to journalArticle

    Abstract

    This is the first molecular study to trace the evolutionary transition in substrate preference across a primate radiation. We surveyed 20 guenons (tribe Cercopithecini) and 4 outgroup taxa for two Y-chromosomal genes, TSPY (∼2240 bp) and SRY (∼780 bp), and one X-chromosomal intergenic region (∼1600 bp) homologous to a fragment of human Xq13.3. Parsimony and maximum likelihood analyses of the sex chromosomal datasets consistently cluster the three terrestrial taxa, Cercopithecus aethiops, Cercopithecus Ihoesti, and Erythrocebus patas, into a group that is reciprocally monophyletic with a clade of arboreal Cercopithecus spp. Given that the common ancestor of the two clades was most likely an arboreal taxon, this phylogenetic pattern suggests the transition to terrestriality occurred only once among the extant guenons. This pattern also indicates that the genus Cercopithecus is paraphyletic, as presently defined, and calls for taxonomic revision so that the nomen describes a strictly monophyletic group. We outline four acceptable taxonomic schemes and suggest that the most appropriate is to reassign C. aethiops, C. Ihoesti, and E. patas to the resurrected genus Chlorocebus. Finally, while the phylogeny and taxonomy of terrestrial guenons were the focus of this study, the X-chromosome sequences presented here represent the first molecular evidence to unambiguously place Allenopithecus nigroviridis as the basal lineage of the tribe Cercopithecini.

    Original languageEnglish (US)
    Pages (from-to)223-237
    Number of pages15
    JournalJournal of Human Evolution
    Volume46
    Issue number2
    DOIs
    StatePublished - 2004

    Fingerprint

    substrate preference
    Cercopithecus
    tribal peoples
    sex chromosomes
    common ancestry
    primate
    chromosome
    Cercopithecus aethiops
    ethnic group
    phylogeny
    phylogenetics
    gene
    outgroup
    Erythrocebus
    taxonomy
    Group
    X chromosome
    taxonomic revisions
    intergenic DNA
    ancestry

    Keywords

    • Cercopithecini
    • Chlorocebus
    • Molecular systematics
    • SRY
    • TSPY
    • X-chromosome
    • Xq13.3
    • Y-chromosome

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics
    • Education
    • Arts and Humanities (miscellaneous)

    Cite this

    Sex chromosome phylogenetics indicate a single transition to terrestriality in the guenons (tribe Cercopithecini). / Tosi, Anthony J.; Melnick, Don J.; Disotell, Todd.

    In: Journal of Human Evolution, Vol. 46, No. 2, 2004, p. 223-237.

    Research output: Contribution to journalArticle

    Tosi, Anthony J. ; Melnick, Don J. ; Disotell, Todd. / Sex chromosome phylogenetics indicate a single transition to terrestriality in the guenons (tribe Cercopithecini). In: Journal of Human Evolution. 2004 ; Vol. 46, No. 2. pp. 223-237.
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