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Phylloscopidae (1 Viewer)

Wu, L., J. Dang, L. Tang, Y. Cheng, G. Song, Y. Sun, J. Martens, M. Päckert, P. Alström, D. Zhang, C. Jia, and F. Lei (2023)
Limited song-mixing without genomic gene flow in a contact zone between two songbird species
Molecular Biology and Evolution (advance online publication)
doi: 10.1093/molbev/msad053

Song is considered to play an important role in the maintenance of prezygotic reproductive isolation between closely related songbird species. Therefore, song-mixing in a contact zone between closely related species is often considered as evidence of hybridization. The Sichuan Leaf Warbler Phylloscopus forresti and the Gansu Leaf Warbler P. kansuensis, which diverged two million years ago, have formed a contact zone in the south of the Gansu Province of China, where mixed-songs have been observed. In this study, we investigated the potential causes and consequences of song-mixing by integrating bioacoustic, morphological, mitochondrial, and genomic data with field ecological observations. We found that the two species display no apparent morphological differences, while their songs differ dramatically. We demonstrated that approximately 11% of the males in the contact zone sang mixed-songs. Two males singing mixed-song were genotyped, and both were found to be P. kansuensis. Despite the presence of mixed-singers, population genomic analyses detected no signs of recent gene flow between the two species, although two possible cases of mitochondrial introgression were identified. We conclude that the rather limited song-mixing does not lead to, or result from, hybridization, and hence does not result in the breakdown of reproductive barriers between these cryptic species.
 
Acanthopneuste floris (Hartert, E, 1898) OD v. 5 (1898) - Novitates zoologicae - Biodiversity Heritage Library

Sorry I do not get the story of Acanthopneuste floris (Hartert, E, 1898). Some souces tells us it is a subspecies of Phylloscopus presbytes e.g. Timor Leaf Warbler - Phylloscopus presbytes - Birds of the World . According Phylloscopus floresianus (floris) (Flores Leaf-Warbler (syn. floris)) - Avibase it is a junior synonym of Phylloscopus floresianus (Dickinson & Christidis, 2014) and Bushtits, leaf warblers, reed warblers – IOC World Bird List do not list the name at all.

Especially the synonym makes no sense to me. Wouldn't Hartert have priority?

 
Acanthopneuste floris (Hartert, E, 1898) OD v. 5 (1898) - Novitates zoologicae - Biodiversity Heritage Library

Sorry I do not get the story of Acanthopneuste floris (Hartert, E, 1898). Some souces tells us it is a subspecies of Phylloscopus presbytes e.g. Timor Leaf Warbler - Phylloscopus presbytes - Birds of the World . According Phylloscopus floresianus (floris) (Flores Leaf-Warbler (syn. floris)) - Avibase it is a junior synonym of Phylloscopus floresianus (Dickinson & Christidis, 2014) and Bushtits, leaf warblers, reed warblers – IOC World Bird List do not list the name at all.

Especially the synonym makes no sense to me. Wouldn't Hartert have priority?
H&M4 says:
The name Seicercus presbytes floresianus is a nomen novum for Acanthopneuste floris Hartert, 1898 which, in Seicercus, is preoccupied by Cryptolopha montis floris Hartert, 1897.
 
On the taxonomic status of the Siberian Chiffchaff Phylloscopus [collybita] tristis (Phylloscopidae)
PAUL DONIOL-VALCROZE



No abstract but free pdf
It doesn't look like it has any new information, just a review of prior publications, but I agree that if Iberian Chiffchaff is considered a separate species, then so should Siberian.
 
Phylogeography of the Island Leaf Warbler (Aves: Phylloscopus Poliocephalus) in Northern Melanesia Reveals Rapid Secondary Sympatry or Ecological Speciation on Kolombangara Island,
Solomon Islands
Lucas H. DeCicco, Devon A. DeRaad, Piokera Holland, Douglas Pikacha Jr., Ikuo Gumo Tigulu, Reuben Tako, David Boseto, Paul R. Sweet, Robert G. Moyle

 
Phylogeography of the Island Leaf Warbler (Aves: Phylloscopus Poliocephalus) in Northern Melanesia Reveals Rapid Secondary Sympatry or Ecological Speciation on Kolombangara Island,
Solomon Islands
Lucas H. DeCicco, Devon A. DeRaad, Piokera Holland, Douglas Pikacha Jr., Ikuo Gumo Tigulu, Reuben Tako, David Boseto, Paul R. Sweet, Robert G. Moyle



Even though the authors don’t give any recommendations, the argument can be made for splitting out the following species from the Island Leaf Warbler complex:
  • Bismarck Leaf Warbler (matthiae, moorhousei, leletensis)
  • Bougainville Leaf Warbler (bougainvillei)
  • ”Pale?” Leaf Warbler (pallescens)
  • Solomons Leaf Warbler (becki)
And retaining Kolombangara (amoenus) and Makira Leaf Warbler (makirensis).
 
Even though the authors don’t give any recommendations, the argument can be made for splitting out the following species from the Island Leaf Warbler complex:
  • Bismarck Leaf Warbler (matthiae, moorhousei, leletensis)
  • Bougainville Leaf Warbler (bougainvillei)
  • ”Pale?” Leaf Warbler (pallescens)
  • Solomons Leaf Warbler (becki)
And retaining Kolombangara (amoenus) and Makira Leaf Warbler (makirensis).
Among these species, which are very close to Phylloscopus poliocephalus?
 
Irwin, D., Bensch, S., Charlebois, C., David, G., Geraldes, A., Gupta, S.K., Harr, B., Holt, P., Irwin, J.H., Ivanitskii, V.V., Marova, I.M., Niu, Y., Seneviratne, S., Singh, A., Wu, Y., Zhang, S. and Price, T.D. (2025), The Distribution and Dispersal of Large Haploblocks in a Superspecies. Mol Ecol e17731. https://doi.org/10.1111/mec.17731

Haploblocks are regions of the genome that coalesce to an ancestor as a single unit. Differentiated haplotypes in these regions can result from the accumulation of mutational differences in low-recombination chromosomal regions, especially when selective sweeps occur within geographically structured populations. We introduce a method to identify large well-differentiated haploblock regions (LHBRs), based on the variance in standardised heterozygosity (ViSHet) of single nucleotide polymorphism (SNP) genotypes among individuals, calculated across a genomic region (500 SNPs in our case). We apply this method to the greenish warbler (Phylloscopus trochiloides) ring species, using a newly assembled reference genome and genotypes at more than 1 million SNPs among 257 individuals. Most chromosomes carry a single distinctive LHBR, containing 4–6 distinct haplotypes that are associated with geography, enabling detection of hybridisation events and transition zones between differentiated populations. LHBRs have exceptionally low within-haplotype nucleotide variation and moderately low between-haplotype nucleotide distance, suggesting their establishment through recurrent selective sweeps at varying geographic scales. Meiotic drive is potentially a powerful mechanism of producing such selective sweeps, and the LHBRs are likely to often represent centromeric regions where recombination is restricted. Links between populations enable introgression of favoured haplotypes and we identify one haploblock showing a highly discordant distribution compared to most of the genome, being present in two distantly separated geographic regions that are at similar latitudes in both east and central Asia. Our results set the stage for detailed studies of haploblocks, including their genomic location, gene content and contribution to reproductive isolation.
 

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