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Título

Molecular Phylogeny of Unikonts: New Insights into the Position of Apusomonads and Ancyromonads and the Internal Relationships of Opisthokonts

Autor Paps, Jordi; Medina-Chacón, Luis A.; Marshall, Wyth L.; Suga, Hiroshi ; Ruiz-Trillo, Iñaki
Palabras clave Cilia
Corallochytrea
Eukaryotic phylogeny
Filasterea
Opisthokonts
Unikonta
Fecha de publicación ene-2013
EditorElsevier
Citación Protist 164(1): 2–12 (2013)
ResumenThe eukaryotic supergroup Opisthokonta includes animals (Metazoa), fungi, and choanoflagellates, as well as the lesser known unicellular lineages Nucleariidae, Fonticula alba, Ichthyosporea, Filasterea and Corallochytrium limacisporum. Whereas the evolutionary positions of the well-known opisthokonts are mostly resolved, the phylogenetic relationships among the more obscure lineages are not. Within the Unikonta (Opisthokonta and Amoebozoa), it has not been determined whether the Apusozoa (apusomonads and ancyromonads) or the Amoebozoa form the sister group to opisthokonts, nor to which side of the hypothesized unikont/bikont divide the Apusozoa belong. Aiming at elucidating the evolutionary tree of the unikonts, we have assembled a dataset with a large sampling of both organisms and genes, including representatives from all known opisthokont lineages. In addition, we include new molecular data from an additional ichthyosporean (Creolimax fragrantissima) and choanoflagellate (Codosiga botrytis). Our analyses show the Apusozoa as a paraphyletic assemblage within the unikonts, with the Apusomonadida forming a sister group to the opisthokonts. Within the Holozoa, the Ichthyosporea diverge first, followed by C. limacisporum, the Filasterea, the Choanoflagellata, and the Metazoa. With our data-enriched tree, it is possible to pinpoint the origin and evolution of morphological characters. As an example, we discuss the evolution of the unikont kinetid.
Descripción PMCID: PMC4342546
Versión del editorhttp://dx.doi.org/10.1016/j.protis.2012.09.002
URI http://hdl.handle.net/10261/113814
DOI10.1016/j.protis.2012.09.002
ISSN1434-4610
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