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Integrative taxonomy of the Russet Bush Warbler Locustella mandelli complex reveals a new species from central China

Alström, Per and Rasmussen, Pamela C. and Xia, Canwei and Olsson, Urban and Dai, Bo and Zhao, Jian and Leader, Paul J. and Carey, Geoff J. and Dong, Lu and Cai, Tianlong and Holt, Paul I and Le Manh, Hung and Song, Gang and Liu, Yang and Zhang, Yanyun and Lei, Fumin (2015). Integrative taxonomy of the Russet Bush Warbler Locustella mandelli complex reveals a new species from central China. Avian research. 6, 1-33
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Abstract

Background
The Russet Bush Warbler Locustella (previously Bradypterus) mandelli complex occurs in mountains in the eastern Himalayas, southern China, Vietnam, the Philippines, and Indonesia. The taxonomy has been debated, with one (L. seebohmi) to four (L. seebohmi, L. mandelli, L. montis and L. timorensis) species having been recognised.

Methods
We used an integrative approach, incorporating analyses of morphology, vocalizations and a molecular marker, to re-evaluate species limits in the L. mandelli complex.

Results
We found that central Chinese L. mandelli differed from those from India through northern Southeast Asia to southeast China in plumage, morphometrics and song. All were easily classified by song, and (wing + culmen)/tail ratio overlapped only marginally. Both groups were reciprocally monophyletic in a mitochondrial cytochrome b (cytb) gene tree, with a mean divergence of 1.0 ± 0.2%. They were sympatric and mostly altitudinally segregated in the breeding season in southern Sichuan province. We found that the Mt Victoria (western Myanmar) population differed vocally from other L. mandelli, but no specimens are available. Taiwan Bush Warbler L. alishanensis was sister to the L. mandelli complex, with the most divergent song. Plumage, vocal and cytb evidence supported the distinctness of the south Vietnamese L. mandelli idonea. The Timor Bush Warbler L. timorensis, Javan Bush Warbler L. montis and Benguet Bush Warbler L. seebohmi differed distinctly in plumage, but among-population song variation in L. montis exceeded the differences between some populations of these taxa, and mean pairwise cytb divergences were only 0.5-0.9%. We also found that some L. montis populations differed morphologically.

Conclusions
We conclude that the central Chinese population of Russet Bush Warbler represents a new species, which we describe herein, breeding at mid elevations in Sichuan, Shaanxi, Hubei, Hunan and Guizhou provinces. The taxonomic status of the other allopatric populations is less clear. However, as they differ to a degree comparable with that of the sympatric L. mandelli and the new species, we elevate L. idonea to species status, and retain L. seebohmi and L. montis as separate species, the latter with timorensis as a subspecies. Further research should focus on different populations of L. montis and the Mt Victoria population of L. mandelli.

Authors/Creators:Alström, Per and Rasmussen, Pamela C. and Xia, Canwei and Olsson, Urban and Dai, Bo and Zhao, Jian and Leader, Paul J. and Carey, Geoff J. and Dong, Lu and Cai, Tianlong and Holt, Paul I and Le Manh, Hung and Song, Gang and Liu, Yang and Zhang, Yanyun and Lei, Fumin
Title:Integrative taxonomy of the Russet Bush Warbler Locustella mandelli complex reveals a new species from central China
Series/Journal:Avian research (2053-7166)
Year of publishing :2015
Volume:6
Page range:1-33
Number of Pages:32
Publisher:BioMed Central
ISSN:2053-7166
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:L Animal production > L60 Animal taxonomy and geography
X Agricola extesions > X30 Life sciences
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Biological Systematics
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Evolutionary Biology
Agrovoc terms:taxonomy, birds
Keywords:Bradypterus, Cryptic species, Locustella seebohmi, Locustella mandelli, Locustella montis, Locustella timorensis, Locustella alishanensis, Locustella idonea, Integrative taxonomy
URN:NBN:urn:nbn:se:slu:epsilon-e-3481
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3481
Additional ID:
Type of IDID
Web of Science (WoS)000369903400001
DOI10.1186/s40657-015-0016-z
ID Code:13392
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Swedish Species Information Centre
Deposited By: SLUpub Connector
Deposited On:07 Jul 2016 07:23
Metadata Last Modified:07 Jul 2016 07:23

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