CiteULike

Delicious

Connotea

Citation for Study 22395

Citation title: "Serial Homology and Correlated Characters in Morphological Phylogenetics: Modeling the Evolution of Dental Crests in Placentals".

Study name: "Serial Homology and Correlated Characters in Morphological Phylogenetics: Modeling the Evolution of Dental Crests in Placentals".

This study is part of submission 22395 (Status: Published).

Citation

Billet G., & Bardin J. 2018. Serial Homology and Correlated Characters in Morphological Phylogenetics: Modeling the Evolution of Dental Crests in Placentals. Systematic Biology, .

Authors

• Billet G. (submitter) 0033-140793814
• Bardin J.

Abstract

Relevant modeling of the complexity of morphological evolution is crucial for morphological phylogenetics and for performing tests on a wide variety of evolutionary scenarios. It faces however many challenges, not the least of which is morphological integration and the problem of correlated categorical characters. In particular, the magnitude and implications of correlations among serially homologous structures such as teeth have been much debated but were never tested statistically within a broad phylogenetic context. Here, we present a large-scale empirical study analyzing the serial variation of cingular crests on successive molars (M1, M2 and M3) of 274 placental species in a phylogenetic context. Both likelihood analyses and analyses of phylogenetic co-distributions demonstrated highly correlated evolution in the entire sample and thus the non-independence of these serial features at a macroevolutionary scale. Likelihood analyses show that their serial variation should be better scored within a single composite character model with constrained paths for transitions enabling simultaneous changes on all three molars. These results are in good agreement with current molecular and developmental knowledge related to dental morphological variation and call into question the frequent use in phylogenetic analyses of separate characters scored on serially homologous structures of the dentition. Overall, they provide long-overdue and clear empirical evidence that in-depth studies of patterns of integration constitute an essential step towards more realistic character construction and modeling, and are thus critical to morphological phylogenetics.

Keywords

Morphological integration; phylogeny; morphology; paleontology; models; rates; categorical characters

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S22395
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref28221,
  	 author = {Guillaume  BILLET and J?r?mie  Bardin},
  	 title = {Serial Homology and Correlated Characters in Morphological Phylogenetics: Modeling the Evolution of Dental Crests in Placentals},
  	 year = {2018},
  	 keywords = {Morphological integration; phylogeny; morphology; paleontology; models; rates; categorical characters},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Systematic Biology},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {Relevant modeling of the complexity of morphological evolution is crucial for morphological phylogenetics and for performing tests on a wide variety of evolutionary scenarios. It faces however many challenges, not the least of which is morphological integration and the problem of correlated categorical characters. In particular, the magnitude and implications of correlations among serially homologous structures such as teeth have been much debated but were never tested statistically within a broad phylogenetic context. Here, we present a large-scale empirical study analyzing the serial variation of cingular crests on successive molars (M1, M2 and M3) of 274 placental species in a phylogenetic context. Both likelihood analyses and analyses of phylogenetic co-distributions demonstrated highly correlated evolution in the entire sample and thus the non-independence of these serial features at a macroevolutionary scale. Likelihood analyses show that their serial variation should be better scored within a single composite character model with constrained paths for transitions enabling simultaneous changes on all three molars. These results are in good agreement with current molecular and developmental knowledge related to dental morphological variation and call into question the frequent use in phylogenetic analyses of separate characters scored on serially homologous structures of the dentition. Overall, they provide long-overdue and clear empirical evidence that in-depth studies of patterns of integration constitute an essential step towards more realistic character construction and modeling, and are thus critical to morphological phylogenetics. }
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 28221
  AU  - BILLET,Guillaume 
  AU  - Bardin,J?r?mie 
  T1  - Serial Homology and Correlated Characters in Morphological Phylogenetics: Modeling the Evolution of Dental Crests in Placentals
  PY  - 2018
  KW  - Morphological integration; phylogeny; morphology; paleontology; models; rates; categorical characters
  UR  - http://dx.doi.org/
  N2  - Relevant modeling of the complexity of morphological evolution is crucial for morphological phylogenetics and for performing tests on a wide variety of evolutionary scenarios. It faces however many challenges, not the least of which is morphological integration and the problem of correlated categorical characters. In particular, the magnitude and implications of correlations among serially homologous structures such as teeth have been much debated but were never tested statistically within a broad phylogenetic context. Here, we present a large-scale empirical study analyzing the serial variation of cingular crests on successive molars (M1, M2 and M3) of 274 placental species in a phylogenetic context. Both likelihood analyses and analyses of phylogenetic co-distributions demonstrated highly correlated evolution in the entire sample and thus the non-independence of these serial features at a macroevolutionary scale. Likelihood analyses show that their serial variation should be better scored within a single composite character model with constrained paths for transitions enabling simultaneous changes on all three molars. These results are in good agreement with current molecular and developmental knowledge related to dental morphological variation and call into question the frequent use in phylogenetic analyses of separate characters scored on serially homologous structures of the dentition. Overall, they provide long-overdue and clear empirical evidence that in-depth studies of patterns of integration constitute an essential step towards more realistic character construction and modeling, and are thus critical to morphological phylogenetics. 
  L3  - 
  JF  - Systematic Biology
  VL  - 
  IS  - 
  ER  -