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Citation for Study 838

Citation title: "Phylogenetic placement of retropinnid fishes: data set incongruence can be reduced using asymmetric character state transformation costs.".

This study was previously identified under the legacy study ID S697 (Status: Published).

Citation

Waters J., Saruwatar T., Kobayashi T., Oohara I., Mcdowall R., & Wallis G. 2002. Phylogenetic placement of retropinnid fishes: data set incongruence can be reduced using asymmetric character state transformation costs. Systematic Biology, 51(3): 432-449.

Authors

• Waters J.
• Saruwatar T.
• Kobayashi T.
• Oohara I.
• Mcdowall R.
• Wallis G.

Abstract

We used mitochondrial DNA sequences to determine the phylogenetic placement of southern smelts (Retropinnidae), a group of diadromous fishes endemic to New Zealand and Australia. Our genetic data strongly support a sister group relationship between retropinnids and northern hemisphere smelts (Osmeridae), a relationship that seems consistent with the similar appearance and life history strategies of these two groups. Our analysis indicates that Retropinnidae and Osmeridae together represent the sister group to the southern hemisphere galaxiid fishes (Galaxiidae). However, this finding conflicts with several recent osteological analyses, which supported a sister relationship for Retropinnidae and Galaxiidae, giving a monophyletic southern hemisphere assemblage (Galaxioidea). We review cases of incongruence and discuss factors that might explain significant disagreement between molecular and morphological data matrices. We suggest that repeated evolutionary simplification may have undermined the accuracy of morphological hypotheses of osmeroid relationships. Although equally weighted parsimony analysis of morphological data rejects the molecular hypothesis (Osmeridae + Retropinnidae), implementation of a range of weighting schemes suggests that incongruence is nonsignificant under asymmetric character transformation models. We propose that a simple "equal transformation cost" parsimony analysis may be biologically unrealistic, especially when reductive homoplasy is widespread; as is increasingly being accepted, complex character states are more readily lost than gained. Therefore, we recommend that morphological systematists routinely implement a range of character transformation models to assess the sensitivity of their phylogenetic reconstructions. We discuss the antitropical biogeography of osmeroid fishes in the context of vicariance and transequatorial dispersal.

Keywords

16S; Australia; character transformation; congruence; cyt b; galaxiid; New Zealand; osmerid; retropinnid; smelt

External links

• DOI: 10.1080/10635150290069887

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S838
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref18074,
  	 author = {Jonathan M.  Waters and T.  Saruwatar and Takanori  Kobayashi and Ichiro  Oohara and Robert M.  McDowall and Graham P.  Wallis},
  	 title = {Phylogenetic placement of retropinnid fishes: data set incongruence can be reduced using asymmetric character state transformation costs.},
  	 year = {2002},
  	 keywords = {16S; Australia; character transformation; congruence; cyt b; galaxiid; New Zealand; osmerid; retropinnid; smelt},
  	 doi = {10.1080/10635150290069887},
  	 url = {},
  	 pmid = {},
  	 journal = {Systematic Biology},
  	 volume = {51},
  	 number = {3},
  	 pages = {432--449},
  	 abstract = {We used mitochondrial DNA sequences to determine the phylogenetic placement of southern smelts (Retropinnidae), a group of diadromous fishes endemic to New Zealand and Australia. Our genetic data strongly support a sister group relationship between retropinnids and northern hemisphere smelts (Osmeridae), a relationship that seems consistent with the similar appearance and life history strategies of these two groups. Our analysis indicates that Retropinnidae and Osmeridae together represent the sister group to the southern hemisphere galaxiid fishes (Galaxiidae). However, this finding conflicts with several recent osteological analyses, which supported a sister relationship for Retropinnidae and Galaxiidae, giving a monophyletic southern hemisphere assemblage (Galaxioidea). We review cases of incongruence and discuss factors that might explain significant disagreement between molecular and morphological data matrices. We suggest that repeated evolutionary simplification may have undermined the accuracy of morphological hypotheses of osmeroid relationships. Although equally weighted parsimony analysis of morphological data rejects the molecular hypothesis (Osmeridae + Retropinnidae), implementation of a range of weighting schemes suggests that incongruence is nonsignificant under asymmetric character transformation models. We propose that a simple "equal transformation cost" parsimony analysis may be biologically unrealistic, especially when reductive homoplasy is widespread; as is increasingly being accepted, complex character states are more readily lost than gained. Therefore, we recommend that morphological systematists routinely implement a range of character transformation models to assess the sensitivity of their phylogenetic reconstructions. We discuss the antitropical biogeography of osmeroid fishes in the context of vicariance and transequatorial dispersal.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 18074
  AU  - Waters,Jonathan M. 
  AU  - Saruwatar,T. 
  AU  - Kobayashi,Takanori 
  AU  - Oohara,Ichiro 
  AU  - McDowall,Robert M. 
  AU  - Wallis,Graham P. 
  T1  - Phylogenetic placement of retropinnid fishes: data set incongruence can be reduced using asymmetric character state transformation costs.
  PY  - 2002
  KW  - 16S; Australia; character transformation; congruence; cyt b; galaxiid; New Zealand; osmerid; retropinnid; smelt
  UR  - http://dx.doi.org/10.1080/10635150290069887
  N2  - We used mitochondrial DNA sequences to determine the phylogenetic placement of southern smelts (Retropinnidae), a group of diadromous fishes endemic to New Zealand and Australia. Our genetic data strongly support a sister group relationship between retropinnids and northern hemisphere smelts (Osmeridae), a relationship that seems consistent with the similar appearance and life history strategies of these two groups. Our analysis indicates that Retropinnidae and Osmeridae together represent the sister group to the southern hemisphere galaxiid fishes (Galaxiidae). However, this finding conflicts with several recent osteological analyses, which supported a sister relationship for Retropinnidae and Galaxiidae, giving a monophyletic southern hemisphere assemblage (Galaxioidea). We review cases of incongruence and discuss factors that might explain significant disagreement between molecular and morphological data matrices. We suggest that repeated evolutionary simplification may have undermined the accuracy of morphological hypotheses of osmeroid relationships. Although equally weighted parsimony analysis of morphological data rejects the molecular hypothesis (Osmeridae + Retropinnidae), implementation of a range of weighting schemes suggests that incongruence is nonsignificant under asymmetric character transformation models. We propose that a simple "equal transformation cost" parsimony analysis may be biologically unrealistic, especially when reductive homoplasy is widespread; as is increasingly being accepted, complex character states are more readily lost than gained. Therefore, we recommend that morphological systematists routinely implement a range of character transformation models to assess the sensitivity of their phylogenetic reconstructions. We discuss the antitropical biogeography of osmeroid fishes in the context of vicariance and transequatorial dispersal.
  L3  - 10.1080/10635150290069887
  JF  - Systematic Biology
  VL  - 51
  IS  - 3
  SP  - 432
  EP  - 449
  ER  -