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  • The other side of the Sahulian coin: biogeography and evolution of Melanesian forest dragons (Agamidae)

    Author(s)
    Tallowin, Oliver JS
    Meiri, Shai
    Donnellan, Stephen C
    Richards, Stephen J
    Austin, Christopher C
    Oliver, Paul M
    Griffith University Author(s)
    Oliver, Paul M.
    Year published
    2020
    Metadata
    Show full item record
    Abstract
    New Guinea has been considered both as a refuge for mesic rainforest-associated lineages that contracted in response to the late Cenozoic aridification of Australia and as a centre of biotic diversification and radiation since the mid-Miocene or earlier. Here, we estimate the diversity and a phylogeny for the Australo-Papuan forest dragons (Sauria: Agamidae; ~20 species) in order to examine the following: (1) whether New Guinea and/or proto-Papuan Islands may have been a biogeographical refuge or a source for diversity in Australia; (2) whether mesic rainforest environments are ancestral to the entire radiation, as may be ...
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    New Guinea has been considered both as a refuge for mesic rainforest-associated lineages that contracted in response to the late Cenozoic aridification of Australia and as a centre of biotic diversification and radiation since the mid-Miocene or earlier. Here, we estimate the diversity and a phylogeny for the Australo-Papuan forest dragons (Sauria: Agamidae; ~20 species) in order to examine the following: (1) whether New Guinea and/or proto-Papuan Islands may have been a biogeographical refuge or a source for diversity in Australia; (2) whether mesic rainforest environments are ancestral to the entire radiation, as may be predicted by the New Guinea refuge hypothesis; and (3) more broadly, how agamid ecological diversity varies across the contrasting environments of Australia and New Guinea. Patterns of lineage distribution and diversity suggest that extinction in Australia, and colonization and radiation on proto-Papuan islands, have both shaped the extant diversity and distribution of forest dragons since the mid-Miocene. The ancestral biome for all Australo-Papuan agamids is ambiguous. Both rainforest and arid-adapted radiations probably started in the early Miocene. However, despite deep-lineage diversity in New Guinea rainforest habitats, overall species and ecological diversity is low when compared with more arid areas, with terrestrial taxa being strikingly absent.
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    Journal Title
    Biological Journal of the Linnean Society
    Volume
    129
    Issue
    1
    DOI
    https://doi.org/10.1093/biolinnean/blz125
    Subject
    Biological sciences
    Science & Technology
    Life Sciences & Biomedicine
    Evolutionary Biology
    Australia
    biogeography
    Publication URI
    http://hdl.handle.net/10072/394654
    Collection
    • Journal articles

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