Phylogenetic Position of Acoel Turbellarians Inferred from Partial 18S rDNA Sequences
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概要
- 論文の詳細を見る
Primitive platyhelminths, especially Acoel turbellarians, are thought to be key to understanding the origin and evolution of metazoa. In order to infer their phylogenetic position within the phylum Platyhelminthes, we determined and compared the complete nucleotide sequence of a region of about 750 base pairs in the central part of an 18S rDNA for ten turbellarians, including two species of the group Acoela, six species of the group Polycladida, and two species of the group Tricladida. The deduced phylogenetic tree suggests that the three groups examined form discrete and separate entities. In addition, the tree suggests an earlier emergence of the Acoel turbellarians than the other platyhelminths. This animal may not be derived by means of secondary reduction from advanced acoelomates but may be nearest to its metazoan ancestors.
- 社団法人日本動物学会の論文
- 1993-06-15
著者
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WADA HIROSHI
Department of Surgery, Graduate School of Medicine, Osaka University
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Satoh N
Department Of Zoology Graduate School Of Science Kyoto University
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Wada Hiroshi
Department Of Cardiovascular Science And Medicine Chiba University Graduate School Of Medicine
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Satoh Noriyuki
Department of Biology, Niigata University
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YAMAMOTO Masamichi
Ushimado Marine Laboratory, Okayama University
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Yamamoto Masamichi
Ushimado Marine Laboratory Okayama University
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Wada H
Institute Of Biological Sciences Universitya Of Tukuba
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Katayama Tomoe
Ushimado Marine Laboratory, Okayama University
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Katayama Tomoe
Ushimado Marine Laboratory Faculty Of Science Okayama University
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Satoh Noriyuki
Department Of Biology Niigata University
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Satoh Noriyuki
Department Of Zoology Faculty Of Science Kyoto University
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Yamamoto Masamichi
Ushimado Marine Laboratory Faculty Of Science Okayama University
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Wada Hiroshi
Department Of Bioengineering And Robotics Tohoku University
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