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Registros recuperados: 13
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A Molecular Perspective On The Diversification Of Short-Tailed Opossums (Monodelphis: Didelphidae) Mastozool. neotrop.
Solari,Sergio.
As currently understood Monodelphis includes more than 22 species and is the most diverse genus of opossums (Didelphimorphia). No complete evaluation of the systematic relationships of its species has been attempted, despite the fact that several species groups and even genus-level groups have been proposed based on morphology, and that some of them are limited to recognized biogeographic regions. Here, genealogic relationships among 17 species were assessed based on phylogenetic analyses of 60 individual sequences (801 base pairs of the mitochondrial cytochrome b gene). The analyses cast doubts on the monophyly of Monodelphis, but species were consistently discriminated into eight species groups: (a) brevicaudata group, with five species, (b) adusta...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Didelphimorphia; Phylogenetics; Species limits; Taxonomy.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832010000200007
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A multivariate analysis of taxonomic limits in Diplolaemus Bell 1843 Gayana
Victoriano,Pedro F; Coronado,Tanía M; Ortiz,Juan Carlos.
The gemís Diplolaemus Bell, 1843 is a common squamate component of the Patagonian región of South América. Considerable taxonomic confusión exists within this gemís, particularly about the status of Chilean-Andean populations and the actual distribution of D. leopardinas (Werner, 1898). In an attempt to clarify the taxonomic status and distribution of Diplolaemus species, we performed a principal component analysis (PCA) and discriminant function analysis (DFA) using both standard morphometric and meristic data. Multivariate summaries of morphometric data show that most species are poorly discriminated, with the exception of D. darwinii. In contrast, a PCA analyses performed on the meristic data clearly distinguish three discrete groups: 1. D. darwinii, 2....
Tipo: Journal article Palavras-chave: Species limits; Taxonomy; Patagonia; Polychrotidae.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000100006
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Biogeographic and conservation implications of revised species limits and distributions of South Asian birds Naturalis
Rasmussen, P.C..
Patterns of breeding species richness and endemism of South Asian birds are described and depicted. The impacts of a taxonomic revision on these patterns and on threat levels of the region’s avifauna are discussed.
Tipo: Article / Letter to the editor Palavras-chave: Biodiversity; Conservation; Species limits; Taxonomic revision; South Asian birds; 42.83.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/210814
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DIVERSITY AND DISTRIBUTION OF THE MOUSE OPOSSUMS OF THE GENUS THYLAMYS (DIDELPHIMORPHIA, DIDELPHIDAE) IN NORTHEASTERN AND CENTRAL ARGENTINA Gayana
Teta,Pablo; D'Elía,Guillermo; Flores,David; de La Sancha,Noé.
Phylogenetic analysis of a fragment of the mitochondrial genome and qualitative and quantitative assessments of morphological variation suggest that, in its current conception, Thylamys pusillus (Desmarest, 1804) is a complex of at least three species. In the taxonomic arrangement proposed in this work, the populations in the Argentinean provinces of Entre Ríos and Corrientes are here referred to T. citellus (Thomas, 1912), while the small Thylamys that lives in the Argentinean Dry Chaco are provisionally referred to T.pulchellus (Cabrera, 1934). In our scheme, Thylamys pusillus is restricted to the Bolivian and Paraguayan Chaco and the vicinities of northern Formosa province in A rgentina. We provide emended diagnosis for T. citellus and T. pulchellus,...
Tipo: Journal article Palavras-chave: Argentina; Mouse opossum; Species limits; Taxonomy.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382009000200003
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REVALUATION OF LATRODECTUS THORACICUS NICOLET, 1849 (ARANEAE: THERIDIIDAE): BIOLOGICAL AND PHYLOGENETIC ANTECEDENTS Gayana
Aguilera,Milenko A; D'Elía,Guillermo; Casanueva,María E.
The number and identity of the species of black widow spiders of the genus Latrodectus that inhabit Chile remain unclear. Here we present results of taxonomic work based on morphologic and molecular characters of a large series of specimens collected throughout Chile, which aimed to assess Chilean Latrodectus diversity. Results show that all studied populations belong to a single species, for which the correct name is Latrodectus thoracicus Nicolet 1849. Therefore, we remove this taxon from the synonymy of L. mactans (Fabricius, 1775). In addition, we suggest that L. mirabilis (Holmberg, 1876) may be junior synonym of L. thoracicus. We recognize two species of black widows for continental Chile, L. thoracicus andi. variegatus Nicolet, 1849. We provided an...
Tipo: Journal article Palavras-chave: Chile; Species limits; Taxonomy; Black widows.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382009000200001
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Scapteromys aquaticus (Rodentia: Sigmodontinae) in Brazil with comments on karyotype and phylogenetics relationships Rev. Bras. Zool.
Bonvicino,Cibele R.; Fernandes,Fabiano A.; Viana,Maria C.; Bernardo,R. Teixeira; D'Andrea,Paulo S..
The swamp rats are distributed in Argentina, southern Paraguay, Uruguay and southern Brazil, with two species currently accepted: Scapteromys aquaticus Thomas, 1920 and Scapteromys tumidus Waterhouse, 1837. While S. aquaticus occurs in Argentina, Paraguay and western Uruguay, S. tumidus occurs in Brazil and Uruguay. Here we report for the first time the occurrence of S. aquaticus in gallery forest remnants in Southern Brazil. Karyologic analysis showed 2n = 32 and FNa = 40. Phylogenetic analyses, based on DNA sequences from the mitochondrial cytochrome-b gene indicate that the Brazilian and the Argentinian specimens of S. aquaticus shared one haplotype, while median joining analysis showed lack of population structure. This register, plus the karyotype...
Tipo: Info:eu-repo/semantics/article Palavras-chave: New record; Southern Brazil; Species limits; Swamp rat.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200016
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Species boundary and extensive hybridization and introgression in Petunia Acta Botanica
Turchetto,Caroline; Schnitzler,Carolina K.; Freitas,Loreta B..
ABSTRACT Studying the role of hybridization in the speciation of plants is one of the most thrilling areas of evolutionary biology. Hybridization in natural populations can act in opposition to divergence, contribute to adaptation through introgression or foster the emergence of new lineages via hybrid speciation. Species of the plant genus Petunia grow in open areas in southern South America. Some natural interspecific hybrid events have been described for the genus, such as between the endemic P. exserta and the widespread P. axillaris. Both species occur in sympatry in Serra do Sudeste (Brazil), where they occur in diverse habitats and exhibit floral divergence, which has been related to the attraction of different primary pollinators. The present study...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gene exchange; Hybridization; Inbreeding; Introgression; Microsatellite; Petunia; Species limits.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400724
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Systematic notes on Asian birds. 41. Territorial songs and species-level taxonomy of nightjars of the Caprimulgus macrurus complex, with the description of a Naturalis
Sangster, G.; Rozendaal, F.G..
The Large-tailed Nightjar Caprimulgus macrurus Horsfield, 1821, complex, as currently recognized, comprises 12 taxa which are grouped into four species based on their territorial songs. However, species limits are based on very small samples of a limited number of taxa in the complex. To further document species limits in the complex, we analysed 109 sound recordings representing all recognized taxa. Principal components analysis suggests the existence of six vocally distinct groups within the complex. Discriminant function analysis assigned 98-100% of individuals correctly to their group. Each of these groups differs diagnosably from all other groups by up to eight vocal characters, and each group is recognizable by ear. We propose to treat these six...
Tipo: Article / Letter to the editor Palavras-chave: Caprimulgus macrurus; Species limits; Taxonomy; Geographic variation; Vocalizations; 42.83.
Ano: 2004 URL: http://www.repository.naturalis.nl/record/215553
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Systematic notes on Asian birds. 49. A preliminary review of the Aegithalidae, Remizidae and Paridae Naturalis
Eck, S.; Martens, J..
Proposed recent taxonomic changes in Paridae, Aegithalidae, and Remizidae are reviewed within the geographic scope of this series and their reliability is discussed in terms of the Biological Species Concept with respect to secondary contacts, hybridization, introgression, bioacoustics, and molecular genetics. Certain previously unpublished data are added to support the taxonomic decisions.
Tipo: Article / Letter to the editor Palavras-chave: Paridae; Aegithalidae; Remizidae; Species limits; Systematics; Taxonomy; Eastern Palaearctic region; Indo-Malayan region; Morphology; Bioacoustics; Molecular genetics; Secondary contacts; Hybridisation; Introgression; 42.83.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/209958
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Systematic Notes on Asian Birds. 62. A preliminary review of the Sittidae Naturalis
Dickinson, E.C..
The Asian species of nuthatch have been reviewed several times in the last 50 years or so although the changes made have sometimes not appeared in the ‘primary’ literature, thus lack supporting explanations or sufficient detail. There continue to be puzzles over species limits, with a great need for molecular studies to inform on relationships as, morphologically, Sitta appears to be sufficiently varied to sustain two or more genera.
Tipo: Article / Letter to the editor Palavras-chave: Nuthatch; Wallcreeper; Species limits; Acoustic evidence.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/210076
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Systematic notes on Asian birds. 65. A preliminary review of the Certhiidae Naturalis
Martens, J.; Tietze, D.T..
Recent proposed taxonomic changes in the Certhiidae are reviewed within the geographic scope of this series and their reliability is discussed in terms of the Biological Species Concept, with respect to secondary contacts, bioacoustics, and molecular genetics. Certain hitherto unpublished data, useful for the understanding of taxonomic decisions, are included. In accordance with Article 24.2.3 of the Code one of us acts as First Reviser in selecting the correct spelling of the name of the recently described Chinese species.
Tipo: Article / Letter to the editor Palavras-chave: Certhiidae; Species limits; Systematics; Taxonomy; First Reviser; Eastern Palaearctic region; Indomalayan region; Morphology; Bioacoustics; Molecular geneticsz; 42.83.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/210083
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Taxonomía alfa de Chelemys y Euneomys (Rodentia, Cricetidae): el número diploide de ejemplares topotípicos de C. macronyx y E. mordax Mastozool. neotrop.
Ojeda,Agustina A.; D'Elía,Guillermo; Ojeda,Ricardo A..
Tipo: Info:eu-repo/semantics/report Palavras-chave: Chelemys; Euneomys; Sigmodontinae; Species limits.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832005000100010
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Taxonomy and biogeography of Stephanoxis Simon, 1897 (Aves: Trochilidae) Pap. Avulsos de Zool. (São Paulo)
Cavarzere,Vagner; Silveira,Luís Fábio; Vasconcelos,Marcelo Ferreira de; Grantsau,Rolf; Straube,Fernando Costa.
After the description in the 19th century of two hummingbird species currently allocated to the genus Stephanoxis, Peters (1945) merged both taxa into a single species without providing any rationale. Here we re-evaluate the taxonomy and species limits of the representatives of this genus based on an extensive number of specimens. We demonstrate these taxa are better treated as full species under both the Biological and Phylogenetic Species Concepts due to their well-defined range and plumage patterns and reciprocally diagnosability. They have distinct, allopatric distributions segregated by a 160 km gap between the Serra do Mar, to the east, and Serra de Paranapiacaba, to the west, in the state of São Paulo. Stephanoxis species have ranges which are...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apodiformes; Atlantic forest; Montane forest; Serra do Mar; Serra de Paranapiacaba; Species limits.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492014000700001
Registros recuperados: 13
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