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Citation for Study 1784

Citation title: "Phylogenetics of the brachyuran crabs (Crustacea: Decapoda): the status of Podotremata based on small subunit nuclear ribosomal RNA".

This study was previously identified under the legacy study ID S1756 (Status: Published).

Citation

Ahyong S., Lai J., Sharkey D., Colgan D., & Ng P. 2007. Phylogenetics of the brachyuran crabs (Crustacea: Decapoda): the status of Podotremata based on small subunit nuclear ribosomal RNA. Molecular Phylogenetics and Evolution, 45(2): 576-586.

Authors

• Ahyong S.
• Lai J.
• Sharkey D.
• Colgan D.
• Ng P.

Abstract

The true crabs, the Brachyura, are generally divided into two major groups, the Eubrachyura or advanced crabs, and the Podotremata or primitive crabs. The status of Podotremata is one of the most controversial issues in brachyuran systematics. The podotreme crabs, best recognized by their possession of gonopores on the coxae of the pereopods, have variously been regarded as mono-, para- or polyphyletic, or even as non-brachyuran. For the first time, the phylogenetic positions of the podotreme crabs were studied by cladistic analysis of small subunit nuclear ribosomal RNA sequences. Eight of 10 podotreme families were represented along with representatives of 17 eubrachyuran families. Under both maximum parsimony and Bayesian Inference, Podotremata was found to be significantly paraphyletic, comprising three major clades: Dromiacea, Raninoida, and Cyclodorippoida. The most basal is Dromiacea, followed by Raninoida and Cylodorippoida. Notably, Cyclodorippoida was identified as the sister group of the Eubrachyura. Previous hypotheses that the dromiid crab, Hypoconcha, is an anomuran were unsupported, though Dromiidae as presently composed could be paraphyletic. Topologies constrained for podotreme monophyly were found to be significantly worse (P<0.04) than unconstrained topologies under Shimodaira-Hasegawa tests. The clear pattern of podotreme paraphyly and robustness of topologies recovered indicates that Podotremata as a formal concept should be abandoned. Relationships among the eubrachyurans were generally equivocal, though results indicate the majoids or dorippoids were the least derived of the Eubrachyura.

External links

• DOI: 10.1016/j.ympev.2007.03.022

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S1784
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref14516,
  	 author = {Shane  Ahyong and Joelle  Lai and Deirdre  Sharkey and Donald J  Colgan and Peter K. L.  Ng},
  	 title = {Phylogenetics of the brachyuran crabs (Crustacea: Decapoda): the status of Podotremata based on small subunit nuclear ribosomal RNA},
  	 year = {2007},
  	 keywords = {},
  	 doi = {10.1016/j.ympev.2007.03.022},
  	 url = {},
  	 pmid = {},
  	 journal = {Molecular Phylogenetics and Evolution},
  	 volume = {45},
  	 number = {2},
  	 pages = {576--586},
  	 abstract = {The true crabs, the Brachyura, are generally divided into two major groups, the Eubrachyura or advanced crabs, and the Podotremata or primitive crabs. The status of Podotremata is one of the most controversial issues in brachyuran systematics. The podotreme crabs, best recognized by their possession of gonopores on the coxae of the pereopods, have variously been regarded as mono-, para- or polyphyletic, or even as non-brachyuran. For the first time, the phylogenetic positions of the podotreme crabs were studied by cladistic analysis of small subunit nuclear ribosomal RNA sequences. Eight of 10 podotreme families were represented along with representatives of 17 eubrachyuran families. Under both maximum parsimony and Bayesian Inference, Podotremata was found to be significantly paraphyletic, comprising three major clades: Dromiacea, Raninoida, and Cyclodorippoida. The most basal is Dromiacea, followed by Raninoida and Cylodorippoida. Notably, Cyclodorippoida was identified as the sister group of the Eubrachyura. Previous hypotheses that the dromiid crab, Hypoconcha, is an anomuran were unsupported, though Dromiidae as presently composed could be paraphyletic. Topologies constrained for podotreme monophyly were found to be significantly worse (P<0.04) than unconstrained topologies under Shimodaira-Hasegawa tests. The clear pattern of podotreme paraphyly and robustness of topologies recovered indicates that Podotremata as a formal concept should be abandoned. Relationships among the eubrachyurans were generally equivocal, though results indicate the majoids or dorippoids were the least derived of the Eubrachyura.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 14516
  AU  - Ahyong,Shane 
  AU  - Lai,Joelle 
  AU  - Sharkey,Deirdre 
  AU  - Colgan,Donald J 
  AU  - Ng,Peter K. L. 
  T1  - Phylogenetics of the brachyuran crabs (Crustacea: Decapoda): the status of Podotremata based on small subunit nuclear ribosomal RNA
  PY  - 2007
  UR  - http://dx.doi.org/10.1016/j.ympev.2007.03.022
  N2  - The true crabs, the Brachyura, are generally divided into two major groups, the Eubrachyura or advanced crabs, and the Podotremata or primitive crabs. The status of Podotremata is one of the most controversial issues in brachyuran systematics. The podotreme crabs, best recognized by their possession of gonopores on the coxae of the pereopods, have variously been regarded as mono-, para- or polyphyletic, or even as non-brachyuran. For the first time, the phylogenetic positions of the podotreme crabs were studied by cladistic analysis of small subunit nuclear ribosomal RNA sequences. Eight of 10 podotreme families were represented along with representatives of 17 eubrachyuran families. Under both maximum parsimony and Bayesian Inference, Podotremata was found to be significantly paraphyletic, comprising three major clades: Dromiacea, Raninoida, and Cyclodorippoida. The most basal is Dromiacea, followed by Raninoida and Cylodorippoida. Notably, Cyclodorippoida was identified as the sister group of the Eubrachyura. Previous hypotheses that the dromiid crab, Hypoconcha, is an anomuran were unsupported, though Dromiidae as presently composed could be paraphyletic. Topologies constrained for podotreme monophyly were found to be significantly worse (P<0.04) than unconstrained topologies under Shimodaira-Hasegawa tests. The clear pattern of podotreme paraphyly and robustness of topologies recovered indicates that Podotremata as a formal concept should be abandoned. Relationships among the eubrachyurans were generally equivocal, though results indicate the majoids or dorippoids were the least derived of the Eubrachyura.
  L3  - 10.1016/j.ympev.2007.03.022
  JF  - Molecular Phylogenetics and Evolution
  VL  - 45
  IS  - 2
  SP  - 576
  EP  - 586
  ER  -