Molecular phylogenetics and species limits in a cryptically coloured radiation of Australo-Papuan passerine birds (Pachycephalidae: Colluricincla)
| Autor: | Knud A. Jønsson, Martin Irestedt, Petter Z. Marki, Jon Fjeldså |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Species complex Time Factors Subspecies 010603 evolutionary biology 01 natural sciences DNA Mitochondrial 03 medical and health sciences Species Specificity Genus Genetics Animals Passeriformes Clade Molecular Biology Ecology Evolution Behavior and Systematics Phylogeny Phylogenetic tree biology Geography Pigmentation Australia Pachycephalidae Bayes Theorem biology.organism_classification 030104 developmental biology Phenotype Evolutionary biology Molecular phylogenetics Pachycephala |
| Zdroj: | Molecular phylogenetics and evolution. 124 |
| ISSN: | 1095-9513 |
| Popis: | Detailed knowledge of species limits is an essential component of the study of biodiversity. Although accurate species delimitation usually requires detailed knowledge of both genetic and phenotypic variation, such variation may be limited or unavailable for some groups. In this study, we reconstruct a molecular phylogeny for all currently recognized species and subspecies of Australasian shrikethrushes (Colluricincla), including the first sequences of the poorly known C. tenebrosa. Using a novel method for species delimitation, the multi-rate Poisson Tree Process (mPTP), in concordance with the phylogenetic data, we estimate species limits in this genetically diverse, but phenotypically subtly differentiated complex of birds. In line with previous studies, we find that one species, the little shrikethrush (C. megarhyncha) is characterized by deep divergences among populations. Delimitation results suggest that these clades represent distinct species and we consequently propose a new classification. Furthermore, our findings suggest that C. megarhyncha melanorhyncha of Biak Island does not belong in this genus, but is nested within the whistlers (Pachycephala) as sister to P. phaionota. This study represents a useful example of species delimitation when phenotypic variation is limited or poorly defined. |
| Databáze: | OpenAIRE |
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