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Pachycephalidae (1 Viewer)

Temotu Whistler

www.worldbirdnames.org/updates/update-diary/
www.worldbirdnames.org/updates/species-updates/
2016 Feb 22: Accept Temotu Whistler
Temotu Whistler Pachycephala vanikorensis ... (Andersen et al. 2014, Jønsson et al. 2014). Includes ornata and utupae, as well as vanikorensis [from Melanesian Whistler Pachycephala chlorura]. Temotu is the local name of the [Santa Cruz] islands and the current and official name of that province in the Solomon Islands
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Boles 2007 (HBW 12).
 
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Baliem Whistler

TiF Update May 31, 2017

Whistlers: The Baliem Whistler, Pachycephala balim has been split from the Yellow-throated Whistler, Pachycephala macrorhyncha, where it had moved from Australian Golden Whistler, Pachycephala pectoralis (see Andersen et al., 2014b; Beehler and Pratt, 2016).
 
Colluricincla

Petter Z. Marki, Jon Fjeldså, Martin Irestedt, Knud A. Jønsson. Molecular phylogenetics and species limits in a cryptically coloured radiation of Australo-Papuan passerine birds (Pachycephalidae: Colluricincla). Molecular Phylogenetics and Evolution, In Press, Accepted Manuscript, Available online 8 March 2018

Abstract:

Detailed knowledge of species limits is an essential component of the study of biodiversity. Although accurate species delimitation usually requires detailed knowledge of both genetic and phenotypic variation, such variation may be limited or unavailable for some groups. In this study, we reconstruct a molecular phylogeny for all currently recognized species and subspecies of Australasian shrikethrushes (Colluricincla), including the first sequences of the poorly known C. tenebrosa. Using a novel method for species delimitation, the multi-rate Poisson Tree Process (mPTP), in concordance with the phylogenetic data, we estimate species limits in this genetically diverse, but phenotypically subtly differentiated complex of birds. In line with previous studies, we find that one species, the little shrikethrush (C. megarhyncha) is characterized by deep divergences among populations. Delimitation results suggest that these clades represent distinct species and we consequently propose a new classification. Furthermore, our findings suggest that C. megarhyncha melanorhyncha of Biak Island does not belong in this genus, but is nested within the whistlers (Pachycephala) as sister to P. phaionota. This study represents a useful example of species delimitation when phenotypic variation is limited or poorly defined.

Proposed species-level taxonomy of C. megarhyncha:

C. megarhyncha (megarhyncha, batantae, parvula) - Arafura Shrikethrush
C. tappenbecki (tappenbecki, madaraszi, maeandrina) - Sepik-Ramu Shrikethrush
C. rufogaster (rufogaster, aelptes, gouldii, griseata, normani, synaptica) - Rufous Shrikethrush
C. discolor (monotypic) - Tagula Shrikethrush
C. obscura (obscura, idenburgi) - Mamberamo Shrikethrush
C. affinis (monotypic) - Waigeo Shrikethrush
C. fortis (fortis, despecta, neos, superflua) - Variable Shrikethrush
 
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Anyone know what happened to form goodsoni?

In HBW Checklist, this is given its own subspecies group as Merauke Shrike-thrush. The Marki paper doesn't mention it at all - is this an omission or has it been synonymised?

Also, supposedly distinctive misoliensis seem to have disappeared.
 
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andrew147 said:
Anyone know what happened to form goodsoni?

In HBW Checklist, this is given its own subspecies group as Merauke Shrike-thrush. The Marki paper doesn't mention it at all - is this an omission or has it been synonymised?

Also, supposedly distinctive misoliensis seem to have disappeared.
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Marki et al., 2018:

Pending further study, we follow the IOC v7.2 World Bird List (Gill and Donsker 2017) in recognizing 20 subspecies. In addition, we recognize both C. m. neos and C. m. madaraszi here, as these forms were found to belong to distinct genetic clades, despite their morphological similarity (Beehler and Pratt 2016).
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Gill & Donsker, IOC6.2:

Subspecies aruensis, misoliensis, ferruginea, goodsoni, and palmeri are all synonymized with the nominate subspecies. Subspecies hybridus is synonymized with idenburgi, subspecies trobriandi is synonymized with fortis, and subspecies madaraszi is synonymized with neos. Beehler & Pratt, 2016.
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They say they discovered that "Colluricincla" (megarhyncha) melanorhyncha is embedded within Pachycephala, but I don't see any figures showing the relationship between P. phaionota and the former "Colluricincla" (megarhyncha) melanorhyncha.
 
andrew147 said:
Anyone know what happened to form goodsoni?

In HBW Checklist, this is given its own subspecies group as Merauke Shrike-thrush. The Marki paper doesn't mention it at all - is this an omission or has it been synonymised?

Also, supposedly distinctive misoliensis seem to have disappeared.
Click to expand...

Hi Andrew,

Our results suggest that goodsoni is embedded within the 'C. rufogaster' group, forming a subclade together with normani and aelptes.

Our initial data included molecular data for 264 individuals. However, a requirement for the species delimitation analyses is that identical sequences are discarded, and we thus only retained sequences for 129 individuals for the phylogenetic and delimitation analyses. The sequences that we had for misoliensis was found to be identical to those of other individuals/subspecies in the megarhyncha/parvula/batantae group, and was therefore removed.

The supplementary files appear not to have been made available yet, but should hopefully be added soon.

Best,
Petter Marki
 
Colluricincla harmonica

Annika Mae Lamb, Anders Gonçalves da Silva, Leo Joseph, Paul Sunnucks & Alexandra Pavlova. Pleistocene-dated biogeographic barriers drove divergence within the Australo-Papuan region in a sex-specific manner: an example in a widespread Australian songbird. Heredity (Published: 15 March 2019).

Abstract:

Understanding how environmental change has shaped species evolution can inform predictions of how future climate change might continue to do so. Research of widespread biological systems spanning multiple climates that have been subject to environmental change can yield generalizable inferences about the neutral and adaptive processes driving lineage divergence during periods of environmental change. We contribute to the growing body of multi-locus phylogeographic studies investigating the effect of Pleistocene climate change on species evolution by focusing on a widespread Australo-Papuan songbird with several mitochondrial lineages that diverged during the Pleistocene, the grey shrike-thrush (Colluricincla harmonica). We employed multi-locus phylogenetic, population genetic and coalescent analyses to (1) assess whether nuclear genetic diversity suggests a history congruent with that based on phenotypically defined subspecies ranges, mitochondrial clade boundaries and putative biogeographical barriers, (2) estimate genetic diversity within and genetic differentiation and gene flow among regional populations and (3) estimate population divergence times. The five currently recognized subspecies of grey shrike-thrush are genetically differentiated in nuclear and mitochondrial genomes, but connected by low levels of gene flow. Divergences among these populations are concordant with recognized historical biogeographical barriers and date to the Pleistocene. Discordance in the order of population divergence events based on mitochondrial and nuclear genomes suggests a history of sex-biased gene flow and/or mitochondrial introgression at secondary contacts. This study demonstrates that climate change can impact sexes with different dispersal biology in different ways. Incongruence between population and mitochondrial trees calls for a genome-wide investigation into dispersal, mitochondrial introgression and mitonuclear evolution.

[pdf]
 
Peter Kovalik said:
Petter Z. Marki, Jon Fjeldså, Martin Irestedt, Knud A. Jønsson. Molecular phylogenetics and species limits in a cryptically coloured radiation of Australo-Papuan passerine birds (Pachycephalidae: Colluricincla). Molecular Phylogenetics and Evolution, In Press, Accepted Manuscript, Available online 8 March 2018

Abstract:

Detailed knowledge of species limits is an essential component of the study of biodiversity. Although accurate species delimitation usually requires detailed knowledge of both genetic and phenotypic variation, such variation may be limited or unavailable for some groups. In this study, we reconstruct a molecular phylogeny for all currently recognized species and subspecies of Australasian shrikethrushes (Colluricincla), including the first sequences of the poorly known C. tenebrosa. Using a novel method for species delimitation, the multi-rate Poisson Tree Process (mPTP), in concordance with the phylogenetic data, we estimate species limits in this genetically diverse, but phenotypically subtly differentiated complex of birds. In line with previous studies, we find that one species, the little shrikethrush (C. megarhyncha) is characterized by deep divergences among populations. Delimitation results suggest that these clades represent distinct species and we consequently propose a new classification. Furthermore, our findings suggest that C. megarhyncha melanorhyncha of Biak Island does not belong in this genus, but is nested within the whistlers (Pachycephala) as sister to P. phaionota. This study represents a useful example of species delimitation when phenotypic variation is limited or poorly defined.

Proposed species-level taxonomy of C. megarhyncha:

C. megarhyncha (megarhyncha, batantae, parvula) - Arafura Shrikethrush
C. tappenbecki (tappenbecki, madaraszi, maeandrina) - Sepik-Ramu Shrikethrush
C. rufogaster (rufogaster, aelptes, gouldii, griseata, normani, synaptica) - Rufous Shrikethrush
C. discolor (monotypic) - Tagula Shrikethrush
C. obscura (obscura, idenburgi) - Mamberamo Shrikethrush
C. affinis (monotypic) - Waigeo Shrikethrush
C. fortis (fortis, despecta, neos, superflua) - Variable Shrikethrush
Click to expand...

IOC Updates Diary May 15

Accept Little Shrikethrush splits [Pachycephala (Colluricincla) melanorhyncha, Colluricincla tappenbecki, Colluricincla rufogaster, Colluricincla discolor, Colluricincla obscura, Colluricincla affinis, Colluricincla fortis]
 
Leo Joseph, Catriona D. Campbell, Alex Drew, Serina S. Brady, Árpád Nyári, and Michael J. Andersen. How far east can a Western Whistler go? Genomic data reveal large eastward range extension, taxonomic and nomenclatural change, and reassessment of conservation needs. Emu, published online 20 December 2020.
https://doi.org/10.1080/01584197.2020.1854047

Abstract:

The Western Whistler Pachycephala occidentalis Ramsay, 1878, endemic to south-western Western Australia, is almost phenotypically identical with P. pectoralis fuliginosa, the westernmost of six subspecies of Golden Whistler P. pectoralis on Australia and its islands. New mitochondrial DNA (mtDNA) sequence data affirm multiple prior studies in aligning P. pectoralis fuliginosa with other subspecies of P. pectoralis, not P. occidentalis. Conversely, principal coordinates and phylogenetic analyses of new data from >17,000 single nucleotide polymorphisms show P. occidentalis and P. pectoralis fuliginosa barely differentiated from each other, neither being close to any P. pectoralis subspecies. In earlier work, weak, ambiguous signal in nuclear DNA sequences possibly suggested close relationship between P. occidentalis and P. pectoralis fuliginosa but was ‘swamped’ by the phylogenetic signal of the mtDNA. Accordingly, we recognise one species, P. fuliginosa Vigors and Horsfield, 1827, having two subspecies P. fuliginosa occidentalis and P. fuliginosa fuliginosa. Western Whistler remains an appropriate English name for the species P. fuliginosa. MtDNA of Golden Whistler P. pectoralis is hypothesised to have introgressed westwards into the range of P. fuliginosa fuliginosa but not further west into P. fuliginosa occidentalis and we address this. Our conclusions open questions for the conservation of the Western Whistler, now known to have a greater breeding range spanning drier parts of South Australia and Victoria and, potentially, western New South Wales where its occurrence is still unproven. For example, what are the extents of seasonal range overlap, intergradation and niche differentiation of Golden and Western Whistlers in south-eastern Australia and of the two subspecies of Western Whistler?
 
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