A snail perspective on the biogeography of Sulawesi, Indonesia: origin and intra-island dispersal of the viviparous freshwater gastropod Tylomelania

The complex geological history of the Indonesian island Sulawesi has shaped the origin and subsequent diversification of its taxa. For the endemic freshwater snail Tylomelania a vicariant origin from the Australian margin has been hypothesized. Divergence time estimates from a mtDNA phylogeny based...

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Bibliographic Details
Published in:PloS one 2014-06, Vol.9 (6), p.e98917-e98917
Main Authors: von Rintelen, Thomas, Stelbrink, Björn, Marwoto, Ristiyanti M, Glaubrecht, Matthias
Format: Article
Language:English
Subjects:
Animals
Biodiversity
Biogeography
Bioinformatics
Biology and Life Sciences
Colonization
Dispersal
Dispersion
Divergence
Ecology and Environmental Sciences
Endemic species
Evolution
Evolution, Molecular
Female
Gastropoda
Genetic diversity
Geography
Geology
Hypotheses
Indonesia
Islands
Male
Miocene
Mitochondrial DNA
Mollusks
Museums
Orogeny
Phylogenetics
Phylogeny
Phylogeography
Pliocene
Snails - genetics
Snails - physiology
Spatial distribution
Taxa
Viviparity, Nonmammalian
Zoology
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Summary:The complex geological history of the Indonesian island Sulawesi has shaped the origin and subsequent diversification of its taxa. For the endemic freshwater snail Tylomelania a vicariant origin from the Australian margin has been hypothesized. Divergence time estimates from a mtDNA phylogeny based on a comprehensive island-wide sampling of Tylomelania fit regional tectonic constraints and support the 'out-of-Australia' vicariance hypothesis. The Banggai-Sula region of the Sula Spur, the Australian promontory colliding with West Sulawesi during the Miocene, is identified as a possible source area for the colonization of Sulawesi by the ancestor of Tylomelania. The molecular phylogeny also shows a rapid diversification of Tylomelania into eight major lineages with very little overlap in their distribution on the island. Haplotype networks provide further evidence for a strong spatial structure of genetic diversity in Tylomelania. Distribution boundaries of the major lineages do at best partially coincide with previously identified contact zones for other endemic species groups on Sulawesi. This pattern has likely been influenced by the poor dispersal capabilities and altitudinal distribution limits of this strict freshwater inhabitant. We suggest that late Miocene and Pliocene orogeny in large parts of Sulawesi has been the vicariant event driving primary diversification in Tylomelania.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0098917