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Integrative taxonomy of the Plain‑backed Thrush (Zoothera mollissima) complex (Aves, Turdidae) reveals cryptic species, including a new species

Alström, Per and Olsson, Urban (2016). Integrative taxonomy of the Plain‑backed Thrush (Zoothera mollissima) complex (Aves, Turdidae) reveals cryptic species, including a new species. Avian research. 7, 1-39
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Official URL: http://dx.doi.org/10.1186/s40657-016-0037-2

Abstract

Background:
The Plain-backed Thrush Zoothera mollissima breeds in the Himalayas and mountains of central China.It was long considered conspecific with the Long-tailed Thrush Zoothera dixoni, until these were shown to be broadlysympatric.

Methods:
We revise the Z. mollissima-Z. dixoni complex by integrating morphological, acoustic, genetic (two mitochondrialand two nuclear markers), ecological and distributional datasets.

Results:
In earlier field observations, we noted two very different song types of "Plain-backed" Thrush segregated by breeding habitat and elevation. Further integrative analyses congruently identify three groups: an alpine breeder inthe Himalayas and Sichuan, China ("Alpine Thrush"); a forest breeder in the eastern Himalayas and northwest Yunnan(at least), China ("Himalayan Forest Thrush"); and a forest breeder in central Sichuan ("Sichuan Forest Thrush"). Alpine and Himalayan Forest Thrushes are broadly sympatric, but segregated by habitat and altitude, and the same is probablytrue also for Alpine and Sichuan Forest Thrushes. These three groups differ markedly in morphology and songs.In addition, DNA sequence data from three non-breeding specimens from Yunnan indicate that yet another lineage exists ("Yunnan Thrush"). However, we find no consistent morphological differences from Alpine Thrush, and its breedingrange is unknown. Molecular phylogenetic analyses suggest that all four groups diverged at least a few million years ago, and identify Alpine Thrush and the putative "Yunnan Thrush" as sisters, and the two forest taxa as sisters. Cytochrome b divergences among the four Z. mollissima sensu lato (s.l.) clades are similar to those between any ofthem and Z. dixoni, and exceed that between the two congeneric outgroup species. We lectotypify the name Oreocincla rostrata Hodgson, 1845 with the Z. mollissima sensu stricto (s.s.) specimen long considered its type. No availablename unambiguously pertains to the Himalayan Forest Thrush.

Conclusions:
The Plain-backed Thrush Z. mollissima s.l. comprises at least three species: Alpine Thrush Z. mollissima s.s., with a widespread alpine breeding distribution; Sichuan Forest Thrush Z. griseiceps, breeding in central Sichuan forests; and Himalayan Forest Thrush, breeding in the eastern Himalayas and northwest Yunnan (at least), which is described herein as a new species. "Yunnan Thrush" requires further study.

Authors/Creators:Alström, Per and Olsson, Urban
Title:Integrative taxonomy of the Plain‑backed Thrush (Zoothera mollissima) complex (Aves, Turdidae) reveals cryptic species, including a new species
Series/Journal:Avian research (2053-7166)
Year of publishing :2016
Volume:7
Page range:1-39
Number of Pages:38
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
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Zoology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Genetics (medical genetics to be 30107 and agricultural genetics to be 40402)
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Bioinformatics and Systems Biology (methods development to be 10203)
(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
Keywords:Systematics, Morphology, Bioacoustics, Altitudinal distributions, Genetic distances, Undescribed taxa, Zoothera dixoni, Lectotypification, Holotype
URN:NBN:urn:nbn:se:slu:epsilon-e-3875
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3875
Additional ID:
Type of IDID
Web of Science (WoS)000386793200001
ID Code:13919
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Swedish Species Information Centre
Deposited By: SLUpub Connector
Deposited On:10 Jan 2017 09:22
Metadata Last Modified:10 Jan 2017 09:22

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