Please use this identifier to cite or link to this item: https://doi.org/10.1186/s12862-017-0882-6
Title: Two new genera of songbirds represent endemic radiations from the Shola Sky Islands of the Western Ghats, India
Authors: Robin, V.V
Vishnudas, C.K
Gupta, P
Rheindt, F.E 
Hooper, D.M
Ramakrishnan, U
Reddy, S
Keywords: adaptive radiation
climate change
conservation status
divergence
endemism
environmental history
island
island biogeography
mountain environment
new species
passerine
phylogenetics
songbird
taxonomy
zoogeography
India
Western Ghats
Aves
Passeri
Passeriformes
Timaliidae
anatomy and histology
animal
biodiversity
classification
climate
India
island (geological)
male
phylogeny
songbird
species difference
vocalization
Animals
Biodiversity
Climate
India
Islands
Male
Phylogeny
Songbirds
Species Specificity
Vocalization, Animal
Issue Date: 2017
Citation: Robin, V.V, Vishnudas, C.K, Gupta, P, Rheindt, F.E, Hooper, D.M, Ramakrishnan, U, Reddy, S (2017). Two new genera of songbirds represent endemic radiations from the Shola Sky Islands of the Western Ghats, India. BMC Evolutionary Biology 17 (1) : 1-14. ScholarBank@NUS Repository. https://doi.org/10.1186/s12862-017-0882-6
Rights: Attribution 4.0 International
Abstract: Background: A long-standing view of Indian biodiversity is that while rich in species, there are few endemics or in-situ radiations within the subcontinent. One exception is the Western Ghats biodiversity hotspot, an isolated mountain range with many endemic species. Understanding the origins of the montane-restricted species is crucial to illuminate both taxonomic and environmental history. Results: With evidence from genetic, morphometric, song, and plumage data, we show that two songbird lineages endemic to the Western Ghats montane forest each have diversified into multiple distinct species. Historically labeled as single species of widespread Asian genera, these two lineages are highly divergent and do not group with the taxa in which they were previously classified but rather are distinct early divergences in larger Asian clades of flycatchers and babblers. Here we designated two new genera, the Western Ghats shortwings as Sholicola and the laughingthrushes as Montecincla, and evaluated species-limits to reflect distinct units by revising six previously named taxa and describing one novel species. Divergence dating showed that both these montane groups split from their Himalayan relatives during the Miocene, which is coincident with a shift towards arid conditions that fragmented the previously contiguous humid forest across peninsular India and isolated these lineages in the Western Ghats. Furthermore, these two genera showed congruent patterns of diversification across the Western Ghats Sky Islands, coincident with other climatic changes. Conclusion: Our study reveals the existence of two independent endemic radiations in the high montane Western Ghats or Shola Sky Islands with coincident divergence times, highlighting the role of climate in the diversification of these ancient lineages. The endemic and highly divergent nature of these previously unrecognized species underscores the dearth of knowledge about the biogeography of the Asian tropics, even for comparatively well-known groups such as birds. The substantial increase in the diversity of this region underscores the need for more rigorous systematic analysis to inform biodiversity studies and conservation efforts. © 2017 The Author(s).
Source Title: BMC Evolutionary Biology
URI: https://scholarbank.nus.edu.sg/handle/10635/181304
ISSN: 14712148
DOI: 10.1186/s12862-017-0882-6
Rights: Attribution 4.0 International
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