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Citation for Study 2020

Citation title: "Broad phylogenomic sampling improves resolution of the Animal Tree of Life".

This study was previously identified under the legacy study ID S2012 (Status: Published).

Citation

Dunn C., Hejnol A., Matus D., Pang K., Browne W., Smith S., Seaver E., Rouse G., Obst M., Edgecombe G., S?rensen M., Haddock S., Schmidt-rhaesa A., Okusu A., Kristensen R., Wheeler W., Martindale M., & Giribet G. 2008. Broad phylogenomic sampling improves resolution of the Animal Tree of Life. Nature, 452(7188): 745-749.

Authors

• Dunn C.
• Hejnol A.
• Matus D.
• Pang K.
• Browne W.
• Smith S.
• Seaver E.
• Rouse G.
• Obst M.
• Edgecombe G.
• S?rensen M.
• Haddock S.
• Schmidt-rhaesa A.
• Okusu A.
• Kristensen R.
• Wheeler W.
• Martindale M.
• Giribet G.

Abstract

Long-held ideas regarding the evolutionary relationships among animals have recently been upended by sometimes controversial hypotheses based largely on insights from molecular data1,2. These new hypotheses include a clade of moulting animals (Ecdysozoa)3 and the close relationship of the lophophorates to molluscs and annelids (Lophotrochozoa)4. Many relationships remain disputed, including those that are required to polarize key features of character evolution, and support for deep nodes is often low. Phylogenomic approaches, which utilize data from many genes, have shown promise for resolving deep animal relationships, but are hindered by a lack of data from many important groups. Here we report a total of 39.9 Mb of Expressed Sequence Tags (ESTs) from 29 animals (Supplementary Table 1) belonging to 21 phyla, including 11 phyla previously lacking genomic or EST data. Analyzed in combination with existing sequences (Figs. 1, 2; Supplementary Fig. 1), our data reinforce several previously identified clades that split deeply in the animal tree (including Protostomia, Ecdysozoa, and Lophotrochozoa), unambiguously resolve multiple long-standing issues for which there was strong conflicting support in earlier studies with less data (such as velvet worms rather than tardigrades as the sister group of arthropods5), and provide molecular support for the monophyly of molluscs, a group long recognized by morphologists, for the first time. In addition, we find strong support for several new hypotheses. These include a clade that unites annelids (including sipunculans and echiurans) with nemerteans, phoronids, and brachiopods, molluscs as sister to that assemblage, and the placement of ctenophores as the earliest diverging extant multicellular animals. A single origin of spiral cleavage (with subsequent losses) is inferred from well-supported nodes. Many relationships between a stable subset of taxa find strong support, and a diminishing number of lineages remain recalcitrant to placement on the tree.

External links

• DOI: 10.1038/nature06614
• PMID: 18322464

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S2020
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref15322,
  	 author = {Casey W  Dunn and Andreas  Hejnol and David Q  Matus and Kevin  Pang and William E  Browne and Stephen A  Smith and Elaine  Seaver and G. W.  Rouse and Matthias  Obst and Gregory D.  Edgecombe and Martin V  S?rensen and Steven H. D.  Haddock and Andreas  Schmidt-Rhaesa and Akiko  Okusu and R. M.  Kristensen and Ward C.  Wheeler and Mark Q.  Martindale and Gonzalo  Giribet},
  	 title = {Broad phylogenomic sampling improves resolution of the Animal Tree of Life},
  	 year = {2008},
  	 keywords = {},
  	 doi = {10.1038/nature06614},
  	 url = {},
  	 pmid = {18322464 },
  	 journal = {Nature},
  	 volume = {452},
  	 number = {7188},
  	 pages = {745--749},
  	 abstract = {Long-held ideas regarding the evolutionary relationships among animals have recently been upended by sometimes controversial hypotheses based largely on insights from molecular data1,2. These new hypotheses include a clade of moulting animals (Ecdysozoa)3 and the close relationship of the lophophorates to molluscs and annelids (Lophotrochozoa)4. Many relationships remain disputed, including those that are required to polarize key features of character evolution, and support for deep nodes is often low. Phylogenomic approaches, which utilize data from many genes, have shown promise for resolving deep animal relationships, but are hindered by a lack of data from many important groups. Here we report a total of 39.9 Mb of Expressed Sequence Tags (ESTs) from 29 animals (Supplementary Table 1) belonging to 21 phyla, including 11 phyla previously lacking genomic or EST data. Analyzed in combination with existing sequences (Figs. 1, 2; Supplementary Fig. 1), our data reinforce several previously identified clades that split deeply in the animal tree (including Protostomia, Ecdysozoa, and Lophotrochozoa), unambiguously resolve multiple long-standing issues for which there was strong conflicting support in earlier studies with less data (such as velvet worms rather than tardigrades as the sister group of arthropods5), and provide molecular support for the monophyly of molluscs, a group long recognized by morphologists, for the first time. In addition, we find strong support for several new hypotheses. These include a clade that unites annelids (including sipunculans and echiurans) with nemerteans, phoronids, and brachiopods, molluscs as sister to that assemblage, and the placement of ctenophores as the earliest diverging extant multicellular animals. A single origin of spiral cleavage (with subsequent losses) is inferred from well-supported nodes. Many relationships between a stable subset of taxa find strong support, and a diminishing number of lineages remain recalcitrant to placement on the tree.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 15322
  AU  - Dunn,Casey W 
  AU  - Hejnol,Andreas 
  AU  - Matus,David Q 
  AU  - Pang,Kevin 
  AU  - Browne,William E 
  AU  - Smith,Stephen A 
  AU  - Seaver,Elaine 
  AU  - Rouse,G. W. 
  AU  - Obst,Matthias 
  AU  - Edgecombe,Gregory D. 
  AU  - S?rensen,Martin V 
  AU  - Haddock,Steven H. D. 
  AU  - Schmidt-Rhaesa,Andreas 
  AU  - Okusu,Akiko 
  AU  - Kristensen,R. M. 
  AU  - Wheeler,Ward C. 
  AU  - Martindale,Mark Q. 
  AU  - Giribet,Gonzalo 
  T1  - Broad phylogenomic sampling improves resolution of the Animal Tree of Life
  PY  - 2008
  KW  - 
  UR  - 
  N2  - Long-held ideas regarding the evolutionary relationships among animals have recently been upended by sometimes controversial hypotheses based largely on insights from molecular data1,2. These new hypotheses include a clade of moulting animals (Ecdysozoa)3 and the close relationship of the lophophorates to molluscs and annelids (Lophotrochozoa)4. Many relationships remain disputed, including those that are required to polarize key features of character evolution, and support for deep nodes is often low. Phylogenomic approaches, which utilize data from many genes, have shown promise for resolving deep animal relationships, but are hindered by a lack of data from many important groups. Here we report a total of 39.9 Mb of Expressed Sequence Tags (ESTs) from 29 animals (Supplementary Table 1) belonging to 21 phyla, including 11 phyla previously lacking genomic or EST data. Analyzed in combination with existing sequences (Figs. 1, 2; Supplementary Fig. 1), our data reinforce several previously identified clades that split deeply in the animal tree (including Protostomia, Ecdysozoa, and Lophotrochozoa), unambiguously resolve multiple long-standing issues for which there was strong conflicting support in earlier studies with less data (such as velvet worms rather than tardigrades as the sister group of arthropods5), and provide molecular support for the monophyly of molluscs, a group long recognized by morphologists, for the first time. In addition, we find strong support for several new hypotheses. These include a clade that unites annelids (including sipunculans and echiurans) with nemerteans, phoronids, and brachiopods, molluscs as sister to that assemblage, and the placement of ctenophores as the earliest diverging extant multicellular animals. A single origin of spiral cleavage (with subsequent losses) is inferred from well-supported nodes. Many relationships between a stable subset of taxa find strong support, and a diminishing number of lineages remain recalcitrant to placement on the tree.
  L3  - 10.1038/nature06614
  JF  - Nature
  VL  - 452
  IS  - 7188
  SP  - 745
  EP  - 749
  ER  -