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Citation for Study 1512

Citation title: "The phylogeny of early eureptiles: comparing parsimony and Bayesian approaches in the investigation of a basal fossil clade.".

This study was previously identified under the legacy study ID S1462 (Status: Published).

Citation

Mueller J., & Reisz R. 2006. The phylogeny of early eureptiles: comparing parsimony and Bayesian approaches in the investigation of a basal fossil clade. Systematic Biology, 55(3): 503-511.

Authors

• Mueller J.
• Reisz R.

Abstract

For the first time the phylogenetic relationships of early eureptiles, consisting of captorhinids, diapsids, and protorothyridids, are investigated in a modern phylogenetic context using both parsimony and Bayesian analysis. 90 parsimony-informative characters and 25 taxa were included in the analyses. The Bayesian analysis was run with and without a gamma shape parameter allowing for variable rates across characters. In addition, we ran two more Bayesian analyses that included 42 autapomorphies and thus parsimony-uninformative characters in order to test the effect of variable branch lengths. The different analyses largely converged to the same topology suggesting that the ?protorothyridid? Coelostegus is the sister taxon of all other eureptiles and that the remaining ?protorothyridids? are paraphyletic. Also, there is a close relationship between diapsids and Anthracodromeus, Cephalerpeton, and Protorothyris, a grouping of Thuringothyris with captorhinids, and a variable position of the ?protorothyridids? Brouffia, Hylonomus, and Paleothyris. The lack of resolution in some parts of the tree might be due to ?hard polytomies? and short divergence times between the respective taxa. The tree topology is consistent with the hypothesis that the temporal fenestrations of diapsid reptiles appear to be the consequence of a more lightly-built skeleton, indicating a significant ecological shift in the early stages of diapsid evolution. Bayesian analysis is a very useful additional approach in studies of fossil taxa in which more traditional statistical support like the bootstrap is often weak. However, the exclusive use of the Mk model appears suitable only if autapomorphic characters are included, while the Mk+gamma model performed well with or without autapomorphies. [Bayesian analysis; Captorhinidae; Diapsida; Eureptilia; fossil taxa; morphological characters; parsimony; Protorothyrididae.]

External links

• DOI: 10.1080/10635150600755396

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S1512
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref16778,
  	 author = {Johannes  Mueller and Robert R.  Reisz},
  	 title = {The phylogeny of early eureptiles: comparing parsimony and Bayesian approaches in the investigation of a basal fossil clade.},
  	 year = {2006},
  	 keywords = {},
  	 doi = {10.1080/10635150600755396},
  	 url = {},
  	 pmid = {},
  	 journal = {Systematic Biology},
  	 volume = {55},
  	 number = {3},
  	 pages = {503--511},
  	 abstract = {For the first time the phylogenetic relationships of early eureptiles, consisting of captorhinids, diapsids, and protorothyridids, are investigated in a modern phylogenetic context using both parsimony and Bayesian analysis. 90 parsimony-informative characters and 25 taxa were included in the analyses. The Bayesian analysis was run with and without a gamma shape parameter allowing for variable rates across characters. In addition, we ran two more Bayesian analyses that included 42 autapomorphies and thus parsimony-uninformative characters in order to test the effect of variable branch lengths. The different analyses largely converged to the same topology suggesting that the ?protorothyridid? Coelostegus is the sister taxon of all other eureptiles and that the remaining ?protorothyridids? are paraphyletic. Also, there is a close relationship between diapsids and Anthracodromeus, Cephalerpeton, and Protorothyris, a grouping of Thuringothyris with captorhinids, and a variable position of the ?protorothyridids? Brouffia, Hylonomus, and Paleothyris. The lack of resolution in some parts of the tree might be due to ?hard polytomies? and short divergence times between the respective taxa. The tree topology is consistent with the hypothesis that the temporal fenestrations of diapsid reptiles appear to be the consequence of a more lightly-built skeleton, indicating a significant ecological shift in the early stages of diapsid evolution. Bayesian analysis is a very useful additional approach in studies of fossil taxa in which more traditional statistical support like the bootstrap is often weak. However, the exclusive use of the Mk model appears suitable only if autapomorphic characters are included, while the Mk+gamma model performed well with or without autapomorphies. [Bayesian analysis; Captorhinidae; Diapsida; Eureptilia; fossil taxa; morphological characters; parsimony; Protorothyrididae.]}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 16778
  AU  - Mueller,Johannes 
  AU  - Reisz,Robert R. 
  T1  - The phylogeny of early eureptiles: comparing parsimony and Bayesian approaches in the investigation of a basal fossil clade.
  PY  - 2006
  KW  - 
  UR  - http://dx.doi.org/10.1080/10635150600755396
  N2  - For the first time the phylogenetic relationships of early eureptiles, consisting of captorhinids, diapsids, and protorothyridids, are investigated in a modern phylogenetic context using both parsimony and Bayesian analysis. 90 parsimony-informative characters and 25 taxa were included in the analyses. The Bayesian analysis was run with and without a gamma shape parameter allowing for variable rates across characters. In addition, we ran two more Bayesian analyses that included 42 autapomorphies and thus parsimony-uninformative characters in order to test the effect of variable branch lengths. The different analyses largely converged to the same topology suggesting that the ?protorothyridid? Coelostegus is the sister taxon of all other eureptiles and that the remaining ?protorothyridids? are paraphyletic. Also, there is a close relationship between diapsids and Anthracodromeus, Cephalerpeton, and Protorothyris, a grouping of Thuringothyris with captorhinids, and a variable position of the ?protorothyridids? Brouffia, Hylonomus, and Paleothyris. The lack of resolution in some parts of the tree might be due to ?hard polytomies? and short divergence times between the respective taxa. The tree topology is consistent with the hypothesis that the temporal fenestrations of diapsid reptiles appear to be the consequence of a more lightly-built skeleton, indicating a significant ecological shift in the early stages of diapsid evolution. Bayesian analysis is a very useful additional approach in studies of fossil taxa in which more traditional statistical support like the bootstrap is often weak. However, the exclusive use of the Mk model appears suitable only if autapomorphic characters are included, while the Mk+gamma model performed well with or without autapomorphies. [Bayesian analysis; Captorhinidae; Diapsida; Eureptilia; fossil taxa; morphological characters; parsimony; Protorothyrididae.]
  L3  - 10.1080/10635150600755396
  JF  - Systematic Biology
  VL  - 55
  IS  - 3
  SP  - 503
  EP  - 511
  ER  -