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	Provedor de dados Zoologia (1) Naturalis (1) Autor Almeida,Waltécio de Oliveira (1) Amorim,Dalton de Souza (1) Christoffersen,Martin Lindsey (1) Garraffoni,André Rinaldo Senna (1) Jenner, Ronald A. (1) Silva,Gustavo Sene (1) Mais... Palavra-chave Bilateria (2) Metazoa (2) Phylogeny (2) 18S rDNA (1) Clitellata (1) Ecdysozoa (1) Enterocoela (1) Gnathostomulida (1) Morphological cladistics (1) Nemertea (1) Platyhelminthes (1) Polychaeta (1) Total evidence (1) Mais... Tipo do documento Article / Letter to the editor (1) Info:eu-repo/semantics/article (1) Ano 2004 (1) 2003 (1) País Brazil (1) Netherlands (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Towards a phylogeny of the Metazoa: evaluating alternative phylogenetic positions of Platyhelminthes, Nemertea, and Gnathostomulida, with a critical reappraisal of cladistic characters Naturalis Jenner, Ronald A.. This paper critically assesses all morphological cladistic analyses of the Metazoa that were published during the last one and a half decades. Molecular and total evidence analyses are also critically reviewed. This study focuses on evaluating alternative phylogenetic positions of the ‘acoelomate’ worms: Platyhelminthes, Nemertea, and Gnathostomulida. This paper consists of two parts. In Part I, all recently proposed sister group hypotheses and the supporting synapomorphies for these phyla are evaluated. Discrepancies in the treatment of corresponding characters in different cladistic analyses are identified, and where possible, resolved. In Part II, the overall phylogenetic significance across the Metazoa of all characters relevant for placing the... Tipo: Article / Letter to the editor Palavras-chave: Platyhelminthes; Nemertea; Gnathostomulida; Metazoa; Bilateria; Phylogeny; Morphological cladistics; 18S rDNA; Total evidence. Ano: 2004 URL: http://www.repository.naturalis.nl/record/534337 Polychaeta, Annelida, and Articulata are not monophyletic: articulating the Metameria (Metazoa, Coelomata) Zoologia Almeida,Waltécio de Oliveira; Christoffersen,Martin Lindsey; Amorim,Dalton de Souza; Garraffoni,André Rinaldo Senna; Silva,Gustavo Sene. Polychaetes are metameric worms recognized for having parapodia, chaetae, and nuchal organs. Some authors have extended the Annelida to include Pogonophora, Echiura, and Clitellata. These suggestions are insufficient to generate a monophyletic group. They do not take into account two very large and important clades that in a cladistic analysis at a higher level are shown to be nested within the Annelida: the Ecdysozoa (arthropods and related taxa) and Enterocoela (deuterostomes and related taxa). Evolutionary histories of most characters across metazoan phyla are still very poorly known. Metameres and coeloms have been considered homoplastic in the literature, and yet the homeobox genes responsible for the expression of metamerism and of paired appendages,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bilateria; Clitellata; Ecdysozoa; Enterocoela; Metazoa; Phylogeny; Polychaeta. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000100006 Registros recuperados: 2 Primeira ... 1 ... Última

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