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https://hdl.handle.net/2440/62262
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Type: | Journal article |
Title: | Uncoupling ecological innovation and speciation in sea snakes (Elapidae, Hydrophiinae, Hydrophiini) |
Author: | Sanders, K. Mumpuni, Lee, M. |
Citation: | Journal of Evolutionary Biology, 2010; 23(12):2685-2693 |
Publisher: | Blackwell Publishing Ltd |
Issue Date: | 2010 |
ISSN: | 1010-061X 1420-9101 |
Statement of Responsibility: | K. L. Sanders, Mumpuni & M. S. Y. Lee |
Abstract: | The viviparous sea snakes (Hydrophiini) are by far the most successful living marine reptiles, with ∼ 60 species that comprise a prominent component of shallow-water marine ecosystems throughout the Indo-West Pacific. Phylogenetically nested within the ∼ 100 species of terrestrial Australo-Melanesian elapids (Hydrophiinae), molecular timescales suggest that the Hydrophiini are also very young, perhaps only ∼ 8-13 Myr old. Here, we use likelihood-based analyses of combined phylogenetic and taxonomic data for Hydrophiinae to show that the initial invasion of marine habitats was not accompanied by elevated diversification rates. Rather, a dramatic three to six-fold increase in diversification rates occurred at least 3-5 Myr after this transition, in a single nested clade: the Hydrophis group accounts for ∼ 80% of species richness in Hydrophiini and ∼ 35% of species richness in (terrestrial and marine) Hydrophiinae. Furthermore, other co-distributed lineages of viviparous sea snakes (and marine Laticauda, Acrochordus and homalopsid snakes) are not especially species rich. Invasion of the oceans has not (by itself) accelerated diversification in Hydrophiini; novelties characterizing the Hydrophis group alone must have contributed to its evolutionary and ecological success. |
Keywords: | diversification rate Hydrophiini phylogenetic analysis sea snakes. |
Rights: | © 2010 The Authors. Journal Compilation © 2010 European Society For Evolutionary Biology |
DOI: | 10.1111/j.1420-9101.2010.02131.x |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1111/j.1420-9101.2010.02131.x |
Appears in Collections: | Aurora harvest 5 Earth and Environmental Sciences publications Environment Institute publications |
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