Bayesian Poisson tree processes and multispecies coalescent models shed new light on the diversification of Nawab butterflies in the Solomon Islands (Nymphalidae, Charaxinae,Polyura)
| Autor: | Emmanuel F. A. Toussaint, Jérôme Morinière, Athena Lam, Bernard Turlin, Michael Balke Fls |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine geography geography.geographical_feature_category biology Ecology Allopatric speciation Subspecies biology.organism_classification 010603 evolutionary biology 01 natural sciences Nymphalidae Coalescent theory 03 medical and health sciences Phylogeography 030104 developmental biology Sister group Polyura Archipelago Animal Science and Zoology Ecology Evolution Behavior and Systematics |
| Zdroj: | Zoological Journal of the Linnean Society. 178:241-256 |
| ISSN: | 0024-4082 |
| DOI: | 10.1111/zoj.12413 |
| Popis: | Butterflies of the genus Polyura form a widespread tropical group distributed from Pakistan to Fiji. The rare endemic Polyura epigenes Godman & Salvin, 1888 from the Solomon Islands archipelago represents a case of marked island polymorphism. We sequenced museum specimens of this species across its geographic range to study the phylogeography and genetic differentiation of populations in the archipelago. We used the Bayesian Poisson tree processes and multispecies coalescent models, to study species boundaries. We also estimated divergence times to investigate the biogeographic history of populations. Our molecular species delimitation and nuclear DNA network analyses unambiguously indicate that Malaita populations form an independent metapopulation lineage, as defined in the generalized lineage concept. This lineage, previously ranked as a subspecies, is raised to species rank under the name Polyura bicolor Turlin & Sato, 1995 stat. nov. Divergence time estimates suggest that this lineage split from its sister taxon in the late Pleistocene. At this time, the bathymetric isolation of Malaita from the rest of the archipelago probably prevented gene flow during periods of lower sea level, thereby fostering allopatric speciation. The combination of molecular species delimitation methods, morphological comparisons, and divergence time estimation is useful to study lineage diversification across intricate geographic regions. |
| Databáze: | OpenAIRE |
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