Peter Kovalik
Well-known member
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Celeus Woodpeckers (1 Viewer)
- Thread starter Peter Kovalik
- Start date
Richard Klim
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SACC proposal
AOU-SACC Proposal #688 (Robbins, Nov 2015): Rearrange linear sequence of species in Celeus (Picidae).
AOU-SACC Proposal #688 (Robbins, Nov 2015): Rearrange linear sequence of species in Celeus (Picidae).
Peter Kovalik
Well-known member
PASSED (31 Jan 2016)
Peter Kovalik
Well-known member
Peter Kovalik
Well-known member
Peter Kovalik
Well-known member
PASSED (4 February 2018)
Peter Kovalik
Well-known member
Celeus undatus and Celeus grammicus
Larissa Sampaio Alexandre Aleixo Horacio Schneider Iracilda Sampaio Juliana Araripe Péricles Sena do Rêgo. Molecular and plumage analyses indicate the incomplete separation of two woodpeckers (Aves, Picidae). Zoologica Scripta. First published: 01 June 2018.
Abstract:
We evaluated the relationship between Celeus undatus and Celeus grammicus, with the objective of clarifying their evolutionary history. We analysed fragments of the mitochondrial and nuclear genes of 57 specimens. For comparative purposes, we inspected the plumage patterns of 77 skins. Our findings highlight the absence of reciprocal monophyly between the two taxa, given their reduced genetic divergence, and the lack of any clear separation of the two forms in the haplotype networks. A similar situation was found in the STRUCTURE analysis, with reciprocal contributions from the two taxa to the respective clusters, indicating that C. grammicus and C. undatus cannot be differentiated using the molecular markers. Corroborating the genetic data, our plumage analyses also failed to find any clear diagnostic characters between the polytypic C. undatus and C. grammicus, as they are defined at present. The genetic profile is consistent with either extensive historical gene flow between the species or, alternatively, incomplete lineage sorting, rather than recent secondary contact. The lack of monophyly between the two taxa impeded subspecies‐level phylogeographic inferences, with the subspecific variation being interpreted as a probable artefact of the phenotypic plasticity of the two forms. These findings indicate clearly that the two taxa form a single evolutionary unit, in which the morphological differentiation used to diagnose the species, combined with their geographic distribution, is at odds with the incomplete separation of the taxa. This may reflect disparities in the rates of differentiation between molecular and phenotypic markers, which is possibly due to the variation in selection pressures along a humidity gradient in Amazonia.
Larissa Sampaio Alexandre Aleixo Horacio Schneider Iracilda Sampaio Juliana Araripe Péricles Sena do Rêgo. Molecular and plumage analyses indicate the incomplete separation of two woodpeckers (Aves, Picidae). Zoologica Scripta. First published: 01 June 2018.
Abstract:
We evaluated the relationship between Celeus undatus and Celeus grammicus, with the objective of clarifying their evolutionary history. We analysed fragments of the mitochondrial and nuclear genes of 57 specimens. For comparative purposes, we inspected the plumage patterns of 77 skins. Our findings highlight the absence of reciprocal monophyly between the two taxa, given their reduced genetic divergence, and the lack of any clear separation of the two forms in the haplotype networks. A similar situation was found in the STRUCTURE analysis, with reciprocal contributions from the two taxa to the respective clusters, indicating that C. grammicus and C. undatus cannot be differentiated using the molecular markers. Corroborating the genetic data, our plumage analyses also failed to find any clear diagnostic characters between the polytypic C. undatus and C. grammicus, as they are defined at present. The genetic profile is consistent with either extensive historical gene flow between the species or, alternatively, incomplete lineage sorting, rather than recent secondary contact. The lack of monophyly between the two taxa impeded subspecies‐level phylogeographic inferences, with the subspecific variation being interpreted as a probable artefact of the phenotypic plasticity of the two forms. These findings indicate clearly that the two taxa form a single evolutionary unit, in which the morphological differentiation used to diagnose the species, combined with their geographic distribution, is at odds with the incomplete separation of the taxa. This may reflect disparities in the rates of differentiation between molecular and phenotypic markers, which is possibly due to the variation in selection pressures along a humidity gradient in Amazonia.
Peter Kovalik
Well-known member
Peter Kovalik
Well-known member
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