Phylogenomic Analysis of Concatenated Ultraconserved Elements Reveals the Recent Evolutionary Radiation of the Fairy Wrasses (Teleostei: Labridae: Cirrhilabrus)
| Autor: | Nathan Lo, Simon Y. W. Ho, Peter F. Cowman, Yi-Kai Tea, Xin Xu, Joseph D. DiBattista |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Cirrhilabrus 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Genetics Animals 14. Life underwater Phylogeny Ecology Evolution Behavior and Systematics Synapomorphy biology Phylogenetic tree Fishes 15. Life on land biology.organism_classification Biological Evolution Incertae sedis Evolutionary radiation Perciformes 030104 developmental biology Cladogenesis Wrasse Evolutionary biology Biological dispersal |
| Zdroj: | Systematic Biology. 71:1-12 |
| ISSN: | 1076-836X 1063-5157 |
| DOI: | 10.1093/sysbio/syab012 |
| Popis: | The fairy wrasses (genus Cirrhilabrus) are among the most successful of the extant wrasse lineages (Teleostei: Labridae), with their 61 species accounting for nearly 10$\%$ of the family. Although species complexes within the genus have been diagnosed on the basis of coloration patterns and synapomorphies, attempts to resolve evolutionary relationships among these groups using molecular and morphological data have largely been unsuccessful. Here, we use a phylogenomic approach with a data set comprising 991 ultraconserved elements (UCEs) and mitochondrial COI to uncover the evolutionary history and patterns of temporal and spatial diversification of the fairy wrasses. Our analyses of phylogenetic signal suggest that most gene-tree incongruence is caused by estimation error, leading to poor resolution in a summary-coalescent analysis of the data. In contrast, analyses of concatenated sequences are able to resolve the major relationships of Cirrhilabrus. We determine the placements of species that were previously regarded as incertae sedis and find evidence for the nesting of Conniella, an unusual, monotypic genus, within Cirrhilabrus. Our relaxed-clock dating analysis indicates that the major divergences within the genus occurred around the Miocene–Pliocene boundary, followed by extensive cladogenesis of species complexes in the Pliocene–Pleistocene. Biogeographic reconstruction suggests that the fairy wrasses emerged within the Coral Triangle, with episodic fluctuations of sea levels during glacial cycles coinciding with shallow divergence events but providing few opportunities for more widespread dispersal. Our study demonstrates both the resolving power and limitations of UCEs across shallow timescales where there is substantial estimation error in individual gene trees.[Biogeography; concatenation; gene genealogy interrogation; gene trees; molecular dating; summary coalescent; UCEs.] |
| Databáze: | OpenAIRE |
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