Join for FREE
It only takes a minute!
Zeiss - Always on the lookout for something special – Shop now

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Pachycephalidae

Reply
 
Thread Tools Rating: Thread Rating: 1 votes, 5.00 average.
Old Thursday 8th March 2018, 17:50   #26
Peter Kovalik
Registered User
 
Peter Kovalik's Avatar

 
Join Date: Oct 2009
Location: Sp. Hrhov
Posts: 2,886
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

Last edited by Peter Kovalik : Thursday 8th March 2018 at 18:02. Reason: Proposed species-level taxonomy
Peter Kovalik is offline  
Reply With Quote
Old Friday 9th March 2018, 08:37   #27
andrew147
Registered User
 
andrew147's Avatar

 
Join Date: Jun 2004
Location: UK
Posts: 141
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.
__________________
Mammals: 328 (Eurasian Beaver)
Birds: 2422 (Capped Wheatear)
Reptiles: 113 (Black Girdled Lizard)

Last edited by andrew147 : Friday 9th March 2018 at 08:52.
andrew147 is offline  
Reply With Quote
Old Friday 9th March 2018, 10:13   #28
Peter Kovalik
Registered User
 
Peter Kovalik's Avatar

 
Join Date: Oct 2009
Location: Sp. Hrhov
Posts: 2,886
Quote:
Originally Posted by andrew147 View Post
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.
Marki et al., 2018:

Quote:
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).
Gill & Donsker, IOC6.2:

Quote:
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.
Peter Kovalik is offline  
Reply With Quote
Old Friday 9th March 2018, 11:28   #29
LeNomenclatoriste
Taxonomy and Shiny hunting
 
LeNomenclatoriste's Avatar

 
Join Date: Jul 2015
Location: La Rochelle (France)
Posts: 693
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.
__________________
All human beings are born free and equal, then they keep each other
LeNomenclatoriste is online now  
Reply With Quote
Old Friday 9th March 2018, 13:04   #30
Petter87
Registered User

 
Join Date: Feb 2007
Location: Kristiansand, Norway
Posts: 7
Quote:
Originally Posted by andrew147 View Post
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.
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
Petter87 is offline  
Reply With Quote
Old Saturday 10th March 2018, 11:30   #31
andrew147
Registered User
 
andrew147's Avatar

 
Join Date: Jun 2004
Location: UK
Posts: 141
Quote:
Originally Posted by Petter87 View Post
goodsoni is embedded within the 'C. rufogaster' group, forming a subclade together with normani and aelptes.
Many thanks
__________________
Mammals: 328 (Eurasian Beaver)
Birds: 2422 (Capped Wheatear)
Reptiles: 113 (Black Girdled Lizard)
andrew147 is offline  
Reply With Quote
Old Tuesday 26th March 2019, 05:11   #32
Peter Kovalik
Registered User
 
Peter Kovalik's Avatar

 
Join Date: Oct 2009
Location: Sp. Hrhov
Posts: 2,886
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 is offline  
Reply With Quote
Old Wednesday 15th May 2019, 23:03   #33
Peter Kovalik
Registered User
 
Peter Kovalik's Avatar

 
Join Date: Oct 2009
Location: Sp. Hrhov
Posts: 2,886
Quote:
Originally Posted by Peter Kovalik View Post
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
IOC Updates Diary May 15

Accept Little Shrikethrush splits [Pachycephala (Colluricincla) melanorhyncha, Colluricincla tappenbecki, Colluricincla rufogaster, Colluricincla discolor, Colluricincla obscura, Colluricincla affinis, Colluricincla fortis]
Peter Kovalik is offline  
Reply With Quote
Advertisement
Reply


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

{googleads}

Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.24920511 seconds with 21 queries
All times are GMT. The time now is 15:05.