Hidden diversity of forest birds in Madagascar revealed using integrative taxonomy

Molecular Phylogenetics and Evolution
Jane L YoungerSushma Reddy

Abstract

Madagascar is renowned as a global biodiversity hotspot with high levels of microendemism. However, there are few molecular phylogenetic studies of Malagasy birds, particularly for forest-dwelling species, signifying a substantial gap in current measures of species diversity in the absence of genetic data. We evaluated species limits and explored patterns of diversification within the genus Newtonia (Family Vangidae), a group of forest-dwelling songbirds endemic to Madagascar. Our modern systematics approach combined genomic, morphometric, and ecological niche data to analyze the evolutionary history of the group. Our integrative analysis uncovered hidden species-level diversity within N. amphichroa, with two deeply divergent and morphologically distinct lineages isolated in different regions of humid forest. We describe the southern lineage as a new species. Conversely, N. brunneicauda, which we initially hypothesized may harbor cryptic diversity owing to its large distribution spanning a range of habitats, was found to have no distinct lineages and shared haplotypes across much of its distribution. The contrasting diversification patterns between Newtonia lineages may be the result of their elevational tolerances. Newtonia br...Continue Reading

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Citations

Nov 26, 2019·Global Ecology and Biogeography : a Journal of Macroecology·Alexander Gamisch
Jan 5, 2021·Ecology and Evolution·Joshua TylerJane L Younger
Jun 3, 2021·Trends in Ecology & Evolution·Benjamin G Freeman, Matthew W Pennell

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