Phylogenetic relationships among turbellarian orders inferred from 18S rDNA sequences.

@article{Katayama1996PhylogeneticRA,
  title={Phylogenetic relationships among turbellarian orders inferred from 18S rDNA sequences.},
  author={Toshiaki Katayama and Midori Nishioka and Masahiko Yamamoto},
  journal={Zoological science},
  year={1996},
  volume={13 5},
  pages={747-56}
}
The turbellarian flatworm is a key group to understand the origin and the early evolution of triploblastic, bilaterally symmetrical animals, but phylogenetic relationships among turbellarian orders have been a subject of debates for decades, especially on the position of the acoel turbellarians. Some workers have considered the acoel representing the most primitive turbellarian order but others have regarded them as regressive. We determined almost the entire lengths of the nucleotide sequences… CONTINUE READING

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