Plumage variability and taxonomy of the Capped Seedeater Sporophila bouvreuil (Aves: Passeriformes: Emberizidae)

Machado, Érika Pereira; Silveira, Luís Fábio

doi:10.11646/zootaxa.2781.1.4

Cited by 18 publications

(14 citation statements)

References 15 publications

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“…Our study of the specimens collected and our field observations on S. iberaensis indicate that there is a range of individual variation in the dark collar, which in some individuals appears as incomplete and in others it looks completely full. Such variability in the extent or intensity of the coloration is reported in males of other species of Sporophila (see Stiles 1996, Machado and Silveira 2011). We noted similar variation in plumage among males of other species of capuchinos in the field sightings in Corrientes.…”

Section: Remarkssupporting

confidence: 64%

“…IS A Neotropical genus of ca 30 species of small (8-10 g) seedeaters of forests, grasslands and wetlands from southern United States to southern South America (Ridgely and Tudor 1989). In recent years a group of smaller species of Sporophila known as capuchinos, that inhabit southern South America grasslands, have attracted increasing interest by researchers who have studied their plumage, vocalizations, breeding ecology, systematic and evolution (Lijtmaer et al 2004, Facchinetti et al 2008, 2011, Areta 2008, 2009, Areta et al 2011, Benites et al 2010, Machado and Silveira 2011, Campagna et al 2009, 2012, Areta and Repenning 2011a, 2011b, Repenning et al 2010). In spite of diverse plumages, vocalizations, and habitat uses of the species of this group some studies indicate that they are genetically very similar (Lijtmaer et al 2004, Campagna et al 2009, 2012).…”

Section: Resumen-mentioning

confidence: 99%

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A New Species of Seedeater (Emberizidae: Sporophila) from the Iberá Grasslands, in Northeast Argentina

Giacomo

Lanús²,

Kopuchian

2016

Preprint

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We describe a new species of capuchino of the genus Sporophila 1 (Emberizidae) of the Esteros del Iberá, province of Corrientes, in northeastern Argentina. 2 This species would have remained unidentified due to lack of ornithological explorations in 3 the central area of the Esteros del Iberá. It has been confused with immature individuals of 4 other Sporophila species. We made observations of behavior and habitat, playback 5 experiments, comparative analyzes of the vocalizations and plumage with other sympatric 6 species of the same genus, and we found this species, which we have named Sporophila 7 iberaensis, inhabiting wet grasslands from the edges of the marshes, having a unique vocal 8 repertoire and a unique plumage. Because of its restricted geographical distribution and the 9 threats that have their habitat, this new species should be categorized as Vulnerable on the 10 IUCN Red List. 11 Sporophila, vocalizations 13 14 RESUMEN.-Describimos una nueva especie de capuchino del género Sporophila 15 (Emberizidae) de los Esteros del Iberá, provincia de Corrientes, en el noreste de Argentina. 16 Esta especie habría permanecido sin identificar debido a la falta de exploraciones 17 ornitológicas en la región central de los Esteros del Iberá y además habría sido confundida 18 con individuos inmaduros de otras especies de Sporophila. Realizamos observaciones de 19 comportamiento y hábitat, experimentos de playback, análisis comparativos de las 20 vocalizaciones y comparaciones del plumaje con otras especies simpátricas del mismo 21 género encontrando que esta especie, a la que nombramos como Sporophila iberaensis, 22 habita pastizales húmedos de los bordes de los esteros, presentando un repertorio vocal y un 1 plumaje únicos. Debido a su distribución restringida y las amenazas que tiene su hábitat, 2 esta nueva especie debe ser categorizada como Vulnerable en la lista roja de la IUCN. 3 4 SPOROPHILA IS A Neotropical genus of ca 30 species of small (8-10 g) seedeaters of 1

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Section: Remarkssupporting

confidence: 64%

Section: Resumen-mentioning

confidence: 99%

A New Species of Seedeater (Emberizidae: Sporophila) from the Iberá Grasslands, in Northeast Argentina

Giacomo

Lanús²,

Kopuchian

2016

Preprint

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“…Additionally, a stub-tailed fledgling with poor flight ability was being fed by adult male at Ituim (28°40'S, 51°13'W), Ipê, 19 February 2010 (MR). The taxon involved is S. b. pileata, for which specific status has been recently proposed (Machado & Silveira, 2011).…”

Section: Methodsmentioning

confidence: 99%

Review of the breeding status of birds in Rio Grande do Sul, Brazil

Maurício

Bencke

Repenning

et al. 2013

Iheringia, Sér. Zool.

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Information on the breeding biology of birds is essential for improving avian life-history theory and implementing sound management and conservation actions for these organisms. Comprehensive reviews of this kind of information are lacking for most Neotropical regions, including Rio Grande do Sul, the southernmost Brazilian state. Aiming to update the knowledge on the reproductive status of birds in Rio Grande do Sul, we reviewed breeding records of all potential breeding species recorded in the state using a set of predefined, restrictive criteria for accepting breeding evidences as effective. Data satisfying our criteria were available for 165 species in the literature. We also collected novel breeding information obtained in the state for an additional 126 species, including observations for several species whose reproductive biology is poorly known. Among these are birds previously unknown to breed in Brazil. This new data and the critical review of the previous information resulted in a total of 291 species for which breeding evidences are accepted as effective. This corresponds to 54.7% of the 532 species considered either confirmed or potential breeders in the state. In addition to providing information on nesting dates, clutch size, nest architecture and breeding behavior of south Brazilian birds, our review serves as a benchmark for the adequate assessment of avian breeding records elsewhere. We hope to stimulate observers to rigorously document breeding events, especially for taxa for which basic information is lacking.

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“…Males defend their territories during simulated intrusions of conspecifics, but not from sympatric male capuchinos of other species (18). The species in the group are otherwise indistinguishable morphologically (19, 20) (and very similar ecologically (21, 22)), to the extent that females and juveniles lacking male secondary sexual characters cannot be identified to species even in the hand (14, 15). Despite their phenotypic diversity in male plumage, southern capuchinos show extremely low levels of genetic differentiation (14), and except for S. bouvreuil cannot be assigned reliably to species even using thousands of genome-wide SNP markers (15).…”

Section: Introductionmentioning

confidence: 99%

Repeated divergent selection on pigmentation genes in a rapid finch radiation driven by sexual selection

Campagna

Repenning

Silveira³

et al. 2016

Preprint

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The search for molecular targets of selection is leading to a better understanding of how evolution shapes biological diversity. Instances of recent and rapid speciation are suitable for associating phenotypes with their causal genotypes, because gene flow may homogenize areas of the genome that are not under divergent selection. Locating differentiated genomic regions among taxa allows us to test associations between the genes in these regions and their contributions to phenotypic diversity. Here we study a rapid radiation of nine sympatric bird species known as southern capuchino seedeaters, which are strikingly differentiated in sexually selected characters of male plumage and song. We sequenced the genomes of 72 individuals representing a diverse set of species and associated phenotypes to search for differentiated genomic regions. We asked what genes are harbored in divergent regions and to what extent has selection on the same targets shaped phenotypic diversity across different lineages. Capuchinos show differences in a small proportion of their genomes, yet selection has acted independently on the same targets during the groups’ radiation. Many divergence peaks contain genes involved in the melanogenesis pathway, with the strongest signal originating from a regulatory region upstream of the gene coding for the Agouti-signaling protein. Across all divergence peaks, the most differentiated areas are similarly likely regulatory. Our findings are consistent with selection acting on the same genomic regions in different lineages to shape the evolution of cis-regulatory elements, which control how more conserved genes are expressed and thereby generate diversity in sexually selected traits.

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Plumage variability and taxonomy of the Capped Seedeater Sporophila bouvreuil (Aves: Passeriformes: Emberizidae)

Cited by 18 publications

References 15 publications

A New Species of Seedeater (Emberizidae: Sporophila) from the Iberá Grasslands, in Northeast Argentina

A New Species of Seedeater (Emberizidae: Sporophila) from the Iberá Grasslands, in Northeast Argentina

Review of the breeding status of birds in Rio Grande do Sul, Brazil

Repeated divergent selection on pigmentation genes in a rapid finch radiation driven by sexual selection

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