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Registros recuperados: 25
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A cladistic re-assessment of the <i>Polycystis</i> species complex (Polycystididae, Eukalyptorhynchia) OMA
Artois, T.J.; Schockaert, E.R..
The taxonomy of the genus <i>Polycystis</i> Koelliker, 1845 <i>sensu</i> Schockaert & Karling, 1975 is discussed. Character analysis reveals the monophyletic state of the three species groups these authors defined within it. As no synapomorphies for the three groups can be found, the genus is split in three genera: <i>Polycystis</i> Koelliker, 1845, <i>Macrorhynchus</i> Graff, 1882 and <i>Paulodora Marcus</i>, 1948. The systematic position of <i>Macrorhynchus yaganus</i> (Marcus, 1954) Evdonin, 1977 is also discussed, resulting in the erection of the new genus <i>Marcusia</i> gen. n.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phylogenetics; Taxonomy; Eukalyptorhynchia; Plathelminthes; Polycystididae; Polycystis.
Ano: 1998 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6815
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Annonaceae substitution rates: a codon model perspective Rev. Bras. Frutic.
Chatrou,Lars Willem; Pirie,Michael David; Velzen,Robin Van; Bakker,Freek Theodoor.
The Annonaceae includes cultivated species of economic interest and represents an important source of information for better understanding the evolution of tropical rainforests. In phylogenetic analyses of DNA sequence data that are used to address evolutionary questions, it is imperative to use appropriate statistical models. Annonaceae are cases in point: Two sister clades, the subfamilies Annonoideae and Malmeoideae, contain the majority of Annonaceae species diversity. The Annonoideae generally show a greater degree of sequence divergence compared to the Malmeoideae, resulting in stark differences in branch lengths in phylogenetic trees. Uncertainty in how to interpret and analyse these differences has led to inconsistent results when estimating the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annonaceae; Branch lengths; Codon models; Non-synonymous substitution rate; Phylogenetics; Synonymous substitution rate.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452014000500013
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The marine brooder Excirolana braziliensis (Crustacea: Isopoda) is also a complex of cryptic species on the coast of Chile RChHN
VARELA,ANDREA I; HAYE,PILAR A.
Speciation is a direct consequence of isolated populations in taxa with low dispersal potential. The brooding crustacean Excirolana braziliensis, with a presumably wide geographic range of distribution (~16° N-41° S in the Pacific and ~19° N-35° S in the Atlantic), has been detected to correspond to cryptic species on the coast of Panama. Latitudinal variations in reproductive features in E. braziliensis have been attributed to phenotypic plasticity, however, the differences may be the result of divergent populations. Considering that the taxon has been reported to be a complex of cryptic species in other geographic areas and given the phenotypic differences detected along its distribution range, we hypothesized that E. braziliensis is a complex of species...
Tipo: Journal article Palavras-chave: Cryptic species; Genetic differentiation; Genetic distance; Marine peracarids; Phylogenetics.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400011
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Taxonomy and evolutionary relationships of Passiflora subg. Decaloba supersect. Decaloba sect. Xerogona (Passifloraceae): contributions of palynological, morphological and molecular studies Acta Botanica
Milward-de-Azevedo,Michaele Alvim; Freitas,Loreta Brandão de; Kinoshita,Luiza Sumiko.
Passiflora subg. Decaloba supersect. Decaloba sect. Xerogona (Passifloraceae) is a tropical and subtropical group comprising 14 species that occur in tropical biomes throughout Latin America, including the Atlantic Forest. The section Xerogona comprises herbaceous vines characterized by a lack of petiole glands on their leaves, of bracts and of ocelli on their leaf blades, as well as by their capsular fruits. We analyzed the phylogeny on the basis of morphological characters (including pollen characters) and molecular data. The inferred phylogeny was used in order to characterize, circumscribe and delimit the section and the species. We examined the phylogenetic relationships among the species, evaluating the circumscription of the section on the basis of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Passiflora; Decaloba; Xerogona; Phylogenetics.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300001
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Distribution of HBV subgenotypes in Ribeirão Preto, Southeastern Brazil: a region with history of intense Italian immigration BJID
Chachá,Silvana Gama Florencio; Gomes-Gouvêa,Michele Soares; Malta,Fernanda de Mello; Ferreira,Sandro da Costa; Villanova,Márcia Guimarães; Souza,Fernanda Fernandes; Teixeira,Andreza Correa; Passos,Afonso Dinis da Costa; Pinho,João Renato Rebello; Martinelli,Ana de Lourdes Candolo.
Abstract Hepatitis B virus (HBV) is distributed worldwide, with geographical variations regarding prevalence of the different genotypes. The aim of this study was to determine the HBV genotypes and subgenotypes circulating in Southeast Brazil and compare the genetic sequences found with HBV sequences previously described in the world. Sequences from 166 chronic HBV carriers were analyzed using the fragment constituted by 1306 base pairs comprising surface and polymerase regions of the HBV genome. The sequences obtained were submitted to phylogenetic analysis. HBV subgenotypes A1, A2, D1-D4, F2a, and F4 were found. HBV genotype D was the most frequent, found in 99 patients (58.4%). Within this group, subgenotype D3 was the most prevalent, in 73 patients...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hepatitis B virus; Genotype; Phylogenetics; Intra-familial transmission.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000400424
Registros recuperados: 25
Primeira ... 12 ... Última
 

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