Journal
THEORY IN BIOSCIENCES
Volume 126, Issue 1, Pages 35-42Publisher
SPRINGER
DOI: 10.1007/s12064-007-0007-7
Keywords
Xenoturbella; phylogeny; mitochondrial genome; basal deuterostomes
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Funding
- Biotechnology and Biological Sciences Research Council [BB/C509866/1] Funding Source: Medline
- Biotechnology and Biological Sciences Research Council [BB/C509866/1] Funding Source: researchfish
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The phylogenetic position of Xenoturbella bocki has been a matter of controversy since its description in 1949. We sequenced a second complete mitochondrial genome of this species and performed phylogenetic analyses based on the amino acid sequences of all 13 mitochondrial protein-coding genes and on its gene order. Our results confirm the deuterostome relationship of Xenoturbella. However, in contrast to a recently published study (Bourlat et al. in Nature 444: 85-88, 2006), our data analysis suggests a more basal branching of Xenoturbella within the deuterostomes, rather than a sister-group relationship to the Ambulacraria (Hemichordata and Echinodermata).
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