Molecular evidence that echiurans and pogonophorans are derived annelids.

@article{McHugh1997MolecularET,
  title={Molecular evidence that echiurans and pogonophorans are derived annelids.},
  author={D. McHugh},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1997},
  volume={94 15},
  pages={
          8006-9
        }
}
  • D. McHugh
  • Published 1997
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • The Annelida, which includes the polychaetes and the clitellates, has long held the taxonomic rank of phylum. The unsegmented, mud-dwelling echiuran spoon worms and the gutless, deep-sea pogonophoran tube worms (including vestimentiferans) share several embryological and morphological features with annelids, but each group also has been considered as a separate metazoan phylum based on the unique characters each group displays. Phylogenetic analyses of DNA sequences from the nuclear gene… CONTINUE READING
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