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Registros recuperados: 10
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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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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
Registros recuperados: 10
Primeira ... 1 ... Última
 

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