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Provedor de dados:  74
País:  Brazil
Título:  Phylogenetic position of Placozoa based on large subunit (LSU) and small subunit (SSU) rRNA genes
Autores:  Silva,Fernanda Britto da
Muschner,Valéria C.
Bonatto,Sandro L.
Data:  2007-01-01
Ano:  2007
Palavras-chave:  Trichoplax adhaerens
Placozoa
Animal basal phylogeny
Metazoa relationship
RRNA genes
Resumo:  The phylum Placozoa, represented by its single species Trichoplax adhaerens, has always been considered one of the most basal animal clades due to its low morphological complexity. However, despite its importance, the phylogenetic position of the Placozoa remains uncertain, as does the relationships between the basal metazoans. We sequenced the nearly complete large subunit (LSU) of the T. adhaerens rRNA gene together with the small subunit (SSU) rRNA and used several methods to infer the phylogenetic position of Placozoa and the relationships between the basal animal phyla. The phylogenetic trees obtained from the LSU, SSU and SSU + LSU datasets support monophyly of all basal metazoan phyla, except the Porifera. However, the relationships between all these phyla were not consistently resolved due to a strong conflict between the LSU and SSU phylogenetic signals. The hypotheses that Placozoa is a derived Cnidaria or the most basal metazoan were not supported by our data. Moreover, our analyses suggests that Placozoa is most likely the sister group of Cnidaria and/or Bilateria.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100022
Editor:  Sociedade Brasileira de Genética
Relação:  10.1590/S1415-47572007000100022
Formato:  text/html
Fonte:  Genetics and Molecular Biology v.30 n.1 2007
Direitos:  info:eu-repo/semantics/openAccess
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