Troglodytidae (1 Viewer)

LeNomenclatoriste said:

Art. 56.2. One-letter difference

Even if the difference between two genus-group names is only one letter, they are not homonyms.

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Yes -- but it has not always been so. No explicit rules were given in the AOU Code prior to the 1908 edition, but Richmond in 1902 was probably using unwritten rules similar to those that were added at that time. See: https://babel.hathitrust.org/cgi/pt?id=hvd.32044062470786&view=1up&seq=64

I assume Leucolepis is what Richmond called Leucolepia?

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yes, obviously.

Anyone knows why Allan Robert Phillips lumped Cyphorhinus phaeocephalus infuscatus with Cyphorhinus phaeocephalus richardsoni (according IOC World bird list)? In Handbook of the Birds of the World it is still a subspecies but ''C. p. chocoanus'' is in question. Has this complex ever been analysed deeper with genetic, vocalization and/or morphological differentiation?

Taphrospilus said:

Anyone knows why Allan Robert Phillips lumped Cyphorhinus phaeocephalus infuscatus with Cyphorhinus phaeocephalus richardsoni (according IOC World bird list)? In Handbook of the Birds of the World it is still a subspecies but ''C. p. chocoanus'' is in question. Has this complex ever been analysed deeper with genetic, vocalization and/or morphological differentiation?

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The comment in the IOC list is misleading. Actually, the merger of infuscatus with richardsoni should be attributed to Dickinson & Christidis (2014) referencing Phillips. A direct reading of Phillips is a little confusing, but it appears that he actually does recognize infuscatus. Rather, he has a note under infuscatus, but which seems to actually apply to richardsoni, that implies that the distinctiveness of the (then) poorly known and limited range richardsoni, with few actual specimens, may be unclear given that "the first specimen from a region is not always representative" and that "variation in Cyphorhinus is impressive".

Given this lack of clarity, and that infuscatus is recognized by most other sources, we will add infuscatus as a subspecies, and also a comment about the questionable validity of chocoanus.

Thanks for bringing this up.

Cyphorhinus arada modulator

I am wondering about the publication date of Cyphorhinus arada modulator. IOC World bird list here claims 1838. I personally tink OD here, but Avibase claims here (think p. 193 is a typo). If correct On the dates of publication of the natural history portions of Alcide d'Orbigny's ‘Voyage Amérique méridionale.’ from Charles Davies Sherborn & Francis James Griffin page 230 of Oiseaux is livresaon 35 from 1837. At least I can't read any controversial from here regarding this name.

So why 1838?

Cyphorhinus arada modulator

So why 1838?

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Date is based on Dickinson & Lebossé. 2018. A study of d’Orbigny’s“ Voyage dans l’Amerique Meridionale” Zoologica lBibliography Vol.5(4):49-274

See Page 109.

https://www.avespress.com/uploads/texteditor/zoological_bibliography_5_4.pdf

David

Henicorhina leucosticta

Miller, M. J., C. Aguilar, J. R. Loaiza, C. D. Cadena, J. L. Pérez-Emán, J, Klicka, R. T. Brumfield, P. Escalante, L. F. De León, K. Winker. Molecular evidence that a widespread Neotropical forest passerine (White- breasted Wood-Wren, Henicorhina leucosticta) comprises multiple species. In revision.

Peter Kovalik said:

Henicorhina leucosticta

Miller, M. J., C. Aguilar, J. R. Loaiza, C. D. Cadena, J. L. Pérez-Emán, J, Klicka, R. T. Brumfield, P. Escalante, L. F. De León, K. Winker. Molecular evidence that a widespread Neotropical forest passerine (White- breasted Wood-Wren, Henicorhina leucosticta) comprises multiple species. In revision.

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Is it related with this?

Mikkelsen, E.K. and D. Irwin (2021)
Ongoing production of low-fitness hybrids limits range overlap between divergent cryptic species
Molecular Ecology (advance online publication)
doi: 10.1111/mec.16015

Contact zones between recently-diverged taxa provide opportunities to examine the causes of reproductive isolation and the processes that determine whether two species can coexist over a broad region. The Pacific Wren (Troglodytes pacificus) and Winter Wren (Troglodytes hiemalis) are two morphologically similar songbirds that started diverging about 4 million years ago, older than most sister species pairs of temperate songbirds. The ranges of these species come into narrow contact in western Canada, where the two species remain distinct. To assess evidence for differentiation, hybridization, and introgression in this system, we examined variation in over 250,000 single nucleotide polymorphism markers distributed across the genome. The two species formed highly divergent genetic clusters, consistent with long-term differentiation. In a set of 75 individuals, two first-generation hybrids (i.e., F1’s) were detected, indicating only moderate levels of assortative mating between these taxa. We found no recent backcrosses or other evidence of recent breeding success of F1’s, indicating very low or zero fitness of F1 hybrids. Examination of genomic variation shows evidence for only a single backcrossing event many generations ago. The moderate rate of hybridization combined with very low F1 hybrid fitness is expected to result in a population sink in the contact zone, largely explaining the narrow overlap of the two species. If such dynamics are common in nature, they could explain the narrow range overlap often observed between pairs of closely related species.

Hernán Vázquez-Miranda, F. Keith Barker (2021). Autosomal, sex-linked and mitochondrial loci resolve evolutionary relationships among wrens in the genus Campylorhynchus. In press, Available online 2 July 2021.​

Autosomal, sex-linked and mitochondrial loci resolve evolutionary relationships among wrens in the genus Campylorhynchus

Although there is general consensus that sampling of multiple genetic loci is critical in accurate reconstruction of species trees, the exact numbers …

www.sciencedirect.com

Abstract
Although there is general consensus that sampling of multiple genetic loci is critical in accurate reconstruction of species trees, the exact numbers and the best types of molecular markers remain an open question. In particular, the phylogenetic utility of sex-linked loci is underexplored. Here, we sample all species and 70% of the named diversity of the New World wren genus Campylorhynchus using sequences from 23 loci, to evaluate the effects of linkage on efficiency in recovering a well-supported tree for the group. At a tree-wide level, we found that most loci supported fewer than half the possible clades and that sex-linked loci produced similar resolution to slower-coalescing autosomal markers, controlling for locus length. By contrast, we did find evidence that linkage affected the efficiency of recovery of individual relationships; as few as two sex-linked loci were necessary to resolve a selection of clades with long to medium subtending branches, whereas 4-6 autosomal loci were necessary to achieve comparable results. These results support an expanded role for sampling of the avian Z chromosome in phylogenetic studies, including target enrichment approaches. Our concatenated and species tree analyses represent significant improvements in our understanding of diversification in Campylorhynchus, and suggest a relatively complex scenario for its radiation across the Miocene/Pliocene boundary, with multiple invasions of South America.

Jim LeNomenclatoriste said:

Hernán Vázquez-Miranda, F. Keith Barker (2021). Autosomal, sex-linked and mitochondrial loci resolve evolutionary relationships among wrens in the genus Campylorhynchus. In press, Available online 2 July 2021.​

Autosomal, sex-linked and mitochondrial loci resolve evolutionary relationships among wrens in the genus Campylorhynchus

Although there is general consensus that sampling of multiple genetic loci is critical in accurate reconstruction of species trees, the exact numbers …

www.sciencedirect.com

Abstract
Although there is general consensus that sampling of multiple genetic loci is critical in accurate reconstruction of species trees, the exact numbers and the best types of molecular markers remain an open question. In particular, the phylogenetic utility of sex-linked loci is underexplored. Here, we sample all species and 70% of the named diversity of the New World wren genus Campylorhynchus using sequences from 23 loci, to evaluate the effects of linkage on efficiency in recovering a well-supported tree for the group. At a tree-wide level, we found that most loci supported fewer than half the possible clades and that sex-linked loci produced similar resolution to slower-coalescing autosomal markers, controlling for locus length. By contrast, we did find evidence that linkage affected the efficiency of recovery of individual relationships; as few as two sex-linked loci were necessary to resolve a selection of clades with long to medium subtending branches, whereas 4-6 autosomal loci were necessary to achieve comparable results. These results support an expanded role for sampling of the avian Z chromosome in phylogenetic studies, including target enrichment approaches. Our concatenated and species tree analyses represent significant improvements in our understanding of diversification in Campylorhynchus, and suggest a relatively complex scenario for its radiation across the Miocene/Pliocene boundary, with multiple invasions of South America.

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If anyone can send me this paper please

Graham, Brendan A., Heath, Daniel D., Pulgarin, Paulo C., Walter, Ryan P., Mark, Melissa, and Mennill, Daniel J. (2022) Habitat connectivity, gene flow, and population genetic structure in a Neotropical understory insectivore, the Rufous-and-white Wren. Ornithology, published 08 July 2022
Habitat connectivity, gene flow, and population genetic structure in a Neotropical understory insectivore, the Rufous-and-white Wren


Abstract
Among tropical organisms, heightened habitat specialization, limited natal dispersal, and strong philopatry suggests that many species may experience reduced rates of gene flow. Diverse forms of barriers, including geographic, ecological, and behavioural barriers, further promote genetic divergence among tropical bird populations. Here we extend our comprehension of gene flow in tropical birds by examining population genetic structure in a widespread insectivorous songbird of the Neotropics, the Rufous-and-white Wren (Thryophilus rufalbus). We explore the effects of geographic distance and habitat connectivity on genetic structure using 10 microsatellite loci, and nuclear and mitochondrial sequence data. We report high levels of genetic divergence and population structure with reduced contemporary gene flow between populations over a 500-km transect in Nicaragua and Costa Rica. Mitochondrial DNA and nuclear sequence data indicate that 2 distinct mtDNA genetic groups came into contact in northwestern Costa Rica; molecular dating suggests that the genetic patterns arose as a result of Pleistocene glaciations. Geographic distance and habitat connectivity predicted genetic structure but explained a relatively low proportion of the observed contemporary genetic variation. Patterns were similar for both males and females. Our research demonstrates the deep genetic divergence in tropical birds, and that genetic differentiation can occur over a relatively short distance. For tropical birds, strong limits to gene flow likely arise as a result of limited dispersal from natal populations.