A multilocus phylogeny reveals deep lineages within African galagids (Primates: Galagidae)

Luca Pozzi, Todd Disotell, Judith C. Masters

    Research output: Contribution to journalArticle

    Abstract

    Background: Bushbabies (Galagidae) are among the most morphologically cryptic of all primates and their diversity and relationships are some of the most longstanding problems in primatology. Our knowledge of galagid evolutionary history has been limited by a lack of appropriate molecular data and a paucity of fossils. Most phylogenetic studies have produced conflicting results for many clades, and even the relationships among genera remain uncertain. To clarify galagid evolutionary history, we assembled the largest molecular dataset for galagos to date by sequencing 27 independent loci. We inferred phylogenetic relationships using concatenated maximum-likelihood and Bayesian analyses, and also coalescent-based species tree methods to account for gene tree heterogeneity due to incomplete lineage sorting. Results: The genus Euoticus was identified as sister taxon to the rest of the galagids and the genus Galagoides was not recovered as monophyletic, suggesting that a new generic name for the Zanzibar complex is required. Despite the amount of genetic data collected in this study, the monophyly of the family Lorisidae remained poorly supported, probably due to the short internode between the Lorisidae/Galagidae split and the origin of the African and Asian lorisid clades. One major result was the relatively old origin for the most recent common ancestor of all living galagids soon after the Eocene-Oligocene boundary. Conclusions: Using a multilocus approach, our results suggest an early origin for the crown Galagidae, soon after the Eocene-Oligocene boundary, making Euoticus one of the oldest lineages within extant Primates. This result also implies that one-or possibly more-stem radiations diverged in the Late Eocene and persisted for several million years alongside members of the crown group.

    Original languageEnglish (US)
    Article number72
    JournalBMC Evolutionary Biology
    Volume14
    Issue number1
    DOIs
    StatePublished - Apr 2 2014

    Fingerprint

    Lorisidae
    Eocene-Oligocene boundary
    primate
    phylogeny
    Primates
    phylogenetics
    tree crown
    common ancestry
    history
    sorting
    Zanzibar
    Galago
    Eocene
    stem
    fossil
    internodes
    monophyly
    gene
    ancestry
    fossils

    Keywords

    • Concatenation
    • Divergence times
    • Eocene-Oligocene boundary
    • Lorisoidea
    • Nuclear DNA
    • Species tree
    • Strepsirhini

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics

    Cite this

    A multilocus phylogeny reveals deep lineages within African galagids (Primates : Galagidae). / Pozzi, Luca; Disotell, Todd; Masters, Judith C.

    In: BMC Evolutionary Biology, Vol. 14, No. 1, 72, 02.04.2014.

    Research output: Contribution to journalArticle

    Pozzi, Luca ; Disotell, Todd ; Masters, Judith C. / A multilocus phylogeny reveals deep lineages within African galagids (Primates : Galagidae). In: BMC Evolutionary Biology. 2014 ; Vol. 14, No. 1.
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