@ARTICLE{TreeBASE2Ref16630,
author = {Damhnait McHugh},
title = {Molecular evidence that echiurans and pogonophorans are derived annelids.},
year = {1997},
keywords = {},
doi = {},
url = {http://www.pnas.org/content/94/15/8006.abstract},
pmid = {},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
volume = {94},
number = {},
pages = {8006--8009},
abstract = {The Annelida, which incl,udes 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 sequencdes from the nuclear gene elongation fatctor-1a place echiurans and pogonophorans within the Annelida. This result, indicating the derived loss of segmentation in echiurnas, has profound implications for our understanding of the evolution of metazoan body plans and challenges the traditional view of the phylum-level diversity and evolutionary relationships of protosome worms.}
}
Taxa for tree 5500 of Study 352
Citation title:
"Molecular evidence that echiurans and pogonophorans are derived annelids.".
This study was previously identified under the legacy study ID S284
(Status: Published).
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