The impact of mitochondrial genome analyses on the understanding of deuterostome phylogeny

Autor(en): Perseke, Marleen
Golombek, Anja
Schlegel, Martin
Struck, Torsten H.
Stichwörter: Ambulacraria; ANIMAL PHYLOGENY; Biochemistry & Molecular Biology; Chordata; CHORDATE PHYLOGENY; DATA SUPPORT; DNA; ECHINODERM CLASSES; Echinodermata; EVOLUTION; Evolutionary Biology; Genetics & Heredity; Mitochondrial genomes; PHYLUM XENOTURBELLIDA; POSITION; SEQUENCE DATA; Tunicata; Xenoturbella; XENOTURBELLA-BOCKI
Erscheinungsdatum: 2013
Herausgeber: ACADEMIC PRESS INC ELSEVIER SCIENCE
Journal: MOLECULAR PHYLOGENETICS AND EVOLUTION
Volumen: 66
Ausgabe: 3
Startseite: 898
Seitenende: 905
Zusammenfassung: 
Deuterostomia, one of the three major lineages of Bilateria, comprises many well-known animals such as vertebrates, sea squirts, sea stars and sea urchins. Whereas monophyly of Deuterostomia and several sub-taxa is well supported, the relationships of these to each other and, hence, deuterostome relationships are still uncertain. To address these issues in deuterostome phylogeny we analyzed datasets comprising more than 300 complete deuterostome mitochondrial genomes. Based on sequence information, the results revealed support for several relationships such as a basal position of Xenoturbella within Deuterostomia or for taxa like Craniota or Ambulacraria, but yielded also problems in some taxa, e.g. Tunicata, Pterobranchia and Ophiuroidea, due to long-branch artifacts. However, within tunicates the relationships are well supported. Variation in the genetic code was also informative and, e.g., supported the taxon Ambulacraria including Pterobranchia. (C) 2012 Elsevier Inc. All rights reserved.
ISSN: 10557903
DOI: 10.1016/j.ympev.2012.11.019

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