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6 results for “Antilophia”
Figures 1–8 in Breeding behavior of the Helmeted Manakin Antilophia galeata (Passeriformes: Pipridae) in a gallery forest from São Paulo state, Brazil
Figures 1–8. Egg color patterns, hatchlings and nestlings of the Helmeted Manakin, Antilophia galeata, in different developmental stages observed in a gallery forest from southeastern Brazil: (1) eggs with light background color and streaks distributed throughout their surfaces; (2) eggs with pale beige background and blotches; (3) eggs with reddish-brown blotches and scratches forming a crown; (4) hatchlings; (5) three days old nestlings evidencing the bright-yellow mouth lining; (6) seven days old nestlings; (7) 10 ten days old nestlings; (8) nestling in the day before fledging.
Data from: Recent chapters of Neotropical history overlooked in phylogeography: shallow divergence explains phenotype and genotype uncoupling in Antilophia manakins
Establishing links between phenotypic and genotypic variation is a central goal of evolutionary biology, as they might provide important insights into evolutionary processes shaping genetic and species diversity in nature. One of the more intriguing possibilities is when no genetic divergence is found to be associated with conspicuous phenotypic divergence. In that case, speciation theory predicts that phenotypic divergence may still occur in the presence of significant gene flow—thereby resulting in little genomic divergence—when genetic loci underpinning phenotypes are under strong divergent selection. However, a finding of phenotypic distinctiveness with weak or no population genetic structure may simply result from low statistical power to detect shallow genetic divergences when small datasets are used. Here, we used a subgenomic dataset of 2386 ultraconserved elements to explore genome-wide divergence between two species of Antilophia manakins, which are phenotypically distinct yet evidently lack strong genetic differentiation according to previous studies based on a limited number of loci. Our results revealed clear population structure that matches the two phenotypes, supporting the idea that smaller datasets lacked the power to detect this recent divergence event (likely < 100 k ya). Indeed, we found little or no introgression between the species, as well as evidence of genome-wide divergence. One implication of our study is that the Araripe plateau may be a hotspot of cryptic-diverging forest Cerrado populations. Besides their use in biogeography, subgenomic datasets may help redefine local conservation programs by revealing cryptic population structure that may be key to population management.
Data from: Recent chapters of Neotropical history overlooked in phylogeography: shallow divergence explains phenotype and genotype uncoupling in Antilophia manakins
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Figures 1-3 from: Ribeiro PVA, Baesse CQ, Cury MC, de Melo C (2020) Leukocyte profile of the helmeted manakin, Antilophia galeata (Passeriformes: Pipridae) in a Cerrado forest fragment. Zoologia 37: 1-9. https://doi.org/10.3897/zoologia.37.e46441
Figures 1-3 Number of lymphocytes for Antilophia galeata in relation to sex (1), presence/absence of incubation patch (2) and presence/absence of ticks (3). Boxes represent mean values while bars represent the standard error.
Data from: Molecular data and distribution dynamics indicate a recent and incomplete separation of manakins species of the genus Antilophia (Aves: Pipridae) in response to Holocene climate change
To determine a hypothetical scenario that accounts for the diversification of the two species of the genus Antilophia, we conducted multilocus molecular comparisons and species distribution modeling for the two taxa, which have distinct male plumage coloration patterns and allopatric geographic distributions, despite the high degree of genetic similarity indicated by recent studies. Three mitochondrial and three nuclear fragments were analyzed. The results indicate clear differences in the genetic diversity of the two species, but with ample sharing of haplotypes in all the markers analyzed, reflecting the absence of reciprocal monophyly, presumably due to the relatively recent and still incomplete separation of the two species. The paleoclimatic distribution models, together with the observed genetic profile indicate a recent process of divergence by geographic isolation in the ancestral populations of the two species. This scenario coincides with the recent climatic events of the South American dry diagonal, which involves the gallery forests of the Cerrado biome and the cloud forest enclaves of the seasonal tropical dry forest of the Caatinga between the late Pleistocene and the mid Holocene.
Data from: Molecular data and distribution dynamics indicate a recent and incomplete separation of manakins species of the genus Antilophia (Aves: Pipridae) in response to Holocene climate change
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