Peter Kovalik
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Sporophila (1 Viewer)
- Thread starter Peter Kovalik
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Peter Kovalik
Well-known member
Richard Klim
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That's certainly hot off the press, Peter! It's still 1 Mar 2011 in the UK.
Richard :t:
GMK
Well-known member
Those with an interest in this topic will probably also like to look at Érika and Luís Fábio's already published contribution on the topic of the seasonal distributions of S. bouvreuil and S. (b.) pileata, here. Doubtless, the authors will post their Zootaxa paper on the same website in due course.
Richard Klim
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Marín et al 2010
Marín-Espinoza, Ouellet & Navarro-Rodríguez 2010. Is a Sporophila lineola/bouvronides/restricta (Aves: Emberizidae) complex a species ring case?: a theorical approach. The Biologist (Lima): 8(2): 212-234.
sisbib.unmsm.edu.pe/BVRevistas/biologist/v08_n2/pdf/a08v08n2.pdf
ABSTRACT: Despite that no ring species have yet been convincingly demonstrated in the western hemisphere, Sporophila lineola/bouvronides/restricta complex may provide a plausible theoretical model in South America. There are at present three distinct forms, with varying proportions of sedentary and partially migratory “races”: S. lineola (L), S. bouvronides (B) and S. restricta (R). Two characters are most obviously subject to variation: the extent (or absence) of white on the crown, and the amount (or absence) of dark mottling or barring on the white underparts. L and B populations occur sympatrically and seasonally, with one of them breeding (B) and the other non-breeding (L) and possessing subtly different song patterns. Interestingly, R is a stable “race” confined to the northwestern corner of South America (i.e., NE Colombia). In addition, there is a highly variable population exhibiting a combination of characters (hybrids?) reported between breeding areas B (e.g., Venezuela) and breeding areas L (e.g., SE Brazil). Moreover, the total extent of the breeding range of the L population is nearly unknown; similarly, where B populations spend the non-breeding season is not yet known. Likewise, we don't know if R populations migrate. If so, it may represent an incipient ring species pattern. Indeed, our hypothesis is consistent with southern american biogeographical history, involving isolation mechanisms. In the first phase, an ancestral species was split into two populations (due to andean uplift), one to the north (R) and the other to the east; secondarily, Pliocene times would have subdivided L (subequatorial breeding) and B (supraequatorial breeding). With the advent of pleistocenic and holocenic regressions and climatic fluctuations, the successive secondary contacts permitted L and B interconnections, involving both ethological (e.g., the cromo-vocalic gradual differentiation) and seasonal isolating mechanisms (e.g., “turnover” of circannual rhythms), which are still in progress, giving way to subpopulations showing complicated and subtle intergradation (clines?) between the three basic forms. It should be emphasized that while we may make reasonable deductions to elucidate some problems, we admit the need for agreed-upon criteria by ornithologists about centers of origin, dispersal and vicariance-panbiogeographic events. Comparison need to be made with molecular systematics in order to reconstruct, for example, a calculation of the time that has elapsed since the L, B, R lineages diverged and in turn the real distributional and speciational patterns of the complex.
Richard (with thanks to Manuel Plenge for posting on NEOORN)
Marín-Espinoza, Ouellet & Navarro-Rodríguez 2010. Is a Sporophila lineola/bouvronides/restricta (Aves: Emberizidae) complex a species ring case?: a theorical approach. The Biologist (Lima): 8(2): 212-234.
sisbib.unmsm.edu.pe/BVRevistas/biologist/v08_n2/pdf/a08v08n2.pdf
ABSTRACT: Despite that no ring species have yet been convincingly demonstrated in the western hemisphere, Sporophila lineola/bouvronides/restricta complex may provide a plausible theoretical model in South America. There are at present three distinct forms, with varying proportions of sedentary and partially migratory “races”: S. lineola (L), S. bouvronides (B) and S. restricta (R). Two characters are most obviously subject to variation: the extent (or absence) of white on the crown, and the amount (or absence) of dark mottling or barring on the white underparts. L and B populations occur sympatrically and seasonally, with one of them breeding (B) and the other non-breeding (L) and possessing subtly different song patterns. Interestingly, R is a stable “race” confined to the northwestern corner of South America (i.e., NE Colombia). In addition, there is a highly variable population exhibiting a combination of characters (hybrids?) reported between breeding areas B (e.g., Venezuela) and breeding areas L (e.g., SE Brazil). Moreover, the total extent of the breeding range of the L population is nearly unknown; similarly, where B populations spend the non-breeding season is not yet known. Likewise, we don't know if R populations migrate. If so, it may represent an incipient ring species pattern. Indeed, our hypothesis is consistent with southern american biogeographical history, involving isolation mechanisms. In the first phase, an ancestral species was split into two populations (due to andean uplift), one to the north (R) and the other to the east; secondarily, Pliocene times would have subdivided L (subequatorial breeding) and B (supraequatorial breeding). With the advent of pleistocenic and holocenic regressions and climatic fluctuations, the successive secondary contacts permitted L and B interconnections, involving both ethological (e.g., the cromo-vocalic gradual differentiation) and seasonal isolating mechanisms (e.g., “turnover” of circannual rhythms), which are still in progress, giving way to subpopulations showing complicated and subtle intergradation (clines?) between the three basic forms. It should be emphasized that while we may make reasonable deductions to elucidate some problems, we admit the need for agreed-upon criteria by ornithologists about centers of origin, dispersal and vicariance-panbiogeographic events. Comparison need to be made with molecular systematics in order to reconstruct, for example, a calculation of the time that has elapsed since the L, B, R lineages diverged and in turn the real distributional and speciational patterns of the complex.
Richard (with thanks to Manuel Plenge for posting on NEOORN)
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Richard Klim
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Areta et al 2011
Areta, Noriega, Pagano & Roesler 2011. Unravelling the ecological radiation of the capuchinos: systematics of Dark-throated Seedeater Sporophila ruficollis and description of a new dark-collared form. Bull BOC 131(1): 4-23. [imminent]
www.birdforum.net/showpost.php?p=2076639&postcount=1
Richard [Thanks for the heads-up, Guy]
Areta, Noriega, Pagano & Roesler 2011. Unravelling the ecological radiation of the capuchinos: systematics of Dark-throated Seedeater Sporophila ruficollis and description of a new dark-collared form. Bull BOC 131(1): 4-23. [imminent]
www.birdforum.net/showpost.php?p=2076639&postcount=1
Richard [Thanks for the heads-up, Guy]
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Richard Klim
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Richard Klim
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'caraguata'
Richard
Illustrates and describes a new dark-collared, rufous-backed form, S 'caraguata' - probably a colour morph of S ruficollis (eg, as S palustris / 'zelichi'), but hybrid origin not completely ruled out.
Richard
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Richard Klim
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Hooded Seedeater
www.birdlife.org/datazone/speciesfactsheet.php?id=9539
It'll be interesting to see if it's recognised in the forthcoming HBW 16. It's listed in Lynx Edicions' IBC.
ibc.lynxeds.com/species/hooded-seedeater-sporophila-melanops
Seems unlikely given SACC's position (not recognised as a valid species):
Hybrids and Dubious Taxa
Sporophila melanops (Pelzeln, 1870). "Hooded Seedeater": known from the type specimen from Goias, Brazil; treated as a valid species by Hellmayr (1938) and Pinto (1944), but usually treated as species of uncertain status (Meyer de Schauensee 1970, Sibley & Monroe 1990); more likely a variant of S. nigricollis or a hybrid than a valid species (Ridgely & Tudor 1989). Meyer de Schauensee (1952) examined a specimen from Goias that he considered possibly this species and different from S. nigricollis. Treated as a valid species by Dickinson et al. (2003). Proposal badly needed.
www.museum.lsu.edu/~Remsen/SACCHybridList.html
But still recognised by BLI:Sporophila melanops (Pelzeln, 1870). "Hooded Seedeater": known from the type specimen from Goias, Brazil; treated as a valid species by Hellmayr (1938) and Pinto (1944), but usually treated as species of uncertain status (Meyer de Schauensee 1970, Sibley & Monroe 1990); more likely a variant of S. nigricollis or a hybrid than a valid species (Ridgely & Tudor 1989). Meyer de Schauensee (1952) examined a specimen from Goias that he considered possibly this species and different from S. nigricollis. Treated as a valid species by Dickinson et al. (2003). Proposal badly needed.
www.museum.lsu.edu/~Remsen/SACCHybridList.html
www.birdlife.org/datazone/speciesfactsheet.php?id=9539
It'll be interesting to see if it's recognised in the forthcoming HBW 16. It's listed in Lynx Edicions' IBC.
ibc.lynxeds.com/species/hooded-seedeater-sporophila-melanops
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Peter Kovalik
Well-known member
GMK
Well-known member
Yes, but, needless to say, I'm not going to reveal the result; you'll have to wait for the paper, which will come, eventually...
Richard Klim
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Peter Kovalik
Well-known member
Sporophila melanogaster
REPENNING, Márcio; ROVEDDER, Cristiano E. e FONTANA, Carla S.. Another color morph of Sporophila Seedeater from the capuchinos group (Aves, Emberizidae)Outro morfo de Sporophila do grupo dos caboclinhos (Aves, Emberizidae). Iheringia, Sér. Zool. [online]. 2010, vol.100, n.4, pp. 369-378. ISSN 0073-4721.
link
PDF
REPENNING, Márcio; ROVEDDER, Cristiano E. e FONTANA, Carla S.. Another color morph of Sporophila Seedeater from the capuchinos group (Aves, Emberizidae)Outro morfo de Sporophila do grupo dos caboclinhos (Aves, Emberizidae). Iheringia, Sér. Zool. [online]. 2010, vol.100, n.4, pp. 369-378. ISSN 0073-4721.
link
Richard Klim
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Sporophila melanogaster
www.openj-gate.com/Browse/Articlelist.aspx?Journal_id=120319
For some reason the links to the paper don't work for me at the moment, but the abstract is viewable here:
www.openj-gate.com/Browse/Articlelist.aspx?Journal_id=120319
Peter Kovalik
Well-known member
CAMPAGNA, L., LIJTMAER, D. A., KERR, K. C. R., BARREIRA, A. S., HEBERT, P. D. N., LOUGHEED, S. C. and TUBARO, P. L. (2010), DNA barcodes provide new evidence of a recent radiation in the genus Sporophila (Aves: Passeriformes). Molecular Ecology Resources, 10: 449–458. doi: 10.1111/j.1755-0998.2009.02799.x
Abstract
Abstract
Daniel Philippe
Well-known member
Iheringia
Good find Peter. Do you happen to know which year this journal started ? A hundred years ago ?
Good find Peter. Do you happen to know which year this journal started ? A hundred years ago ?
Daniel Philippe
Well-known member
