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Research Article

Phylogeny and tempo of diversification in the superradiation of spiny-rayed fishes

Thomas J. Near, Alex Dornburg, Ron I. Eytan, Benjamin P. Keck, W. Leo Smith, Kristen L. Kuhn, Jon A. Moore, Samantha A. Price, Frank T. Burbrink, Matt Friedman, and Peter C. Wainwright
PNAS first published July 15, 2013; https://doi.org/10.1073/pnas.1304661110
Thomas J. Near
aDepartment of Ecology and Evolutionary Biology and Peabody Museum of Natural History, Yale University, New Haven, CT 06520;
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  • For correspondence: thomas.near@yale.edu
Alex Dornburg
aDepartment of Ecology and Evolutionary Biology and Peabody Museum of Natural History, Yale University, New Haven, CT 06520;
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Ron I. Eytan
aDepartment of Ecology and Evolutionary Biology and Peabody Museum of Natural History, Yale University, New Haven, CT 06520;
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Benjamin P. Keck
bDepartment of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996;
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W. Leo Smith
cDivision of Fishes, The Field Museum, Chicago, IL 60605;
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Kristen L. Kuhn
aDepartment of Ecology and Evolutionary Biology and Peabody Museum of Natural History, Yale University, New Haven, CT 06520;
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Jon A. Moore
dWilkes Honors College and Harbor Branch Oceanographic Institution, Florida Atlantic University, Jupiter, FL 33458;
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Samantha A. Price
eDepartment of Evolution and Ecology, University of California, Davis, CA 95616;
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Frank T. Burbrink
fBiology Department, College of Staten Island/City University of New York, Staten Island, NY 10314; and
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Matt Friedman
gDepartment of Earth Sciences, University of Oxford, Oxford OX1 3AN, United Kingdom
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Peter C. Wainwright
eDepartment of Evolution and Ecology, University of California, Davis, CA 95616;
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  1. Edited by David M. Hillis, University of Texas at Austin, Austin, TX, and approved June 14, 2013 (received for review March 11, 2013)

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Abstract

Spiny-rayed fishes, or acanthomorphs, comprise nearly one-third of all living vertebrates. Despite their dominant role in aquatic ecosystems, the evolutionary history and tempo of acanthomorph diversification is poorly understood. We investigate the pattern of lineage diversification in acanthomorphs by using a well-resolved time-calibrated phylogeny inferred from a nuclear gene supermatrix that includes 520 acanthomorph species and 37 fossil age constraints. This phylogeny provides resolution for what has been classically referred to as the “bush at the top” of the teleost tree, and indicates acanthomorphs originated in the Early Cretaceous. Paleontological evidence suggests acanthomorphs exhibit a pulse of morphological diversification following the end Cretaceous mass extinction; however, the role of this event on the accumulation of living acanthomorph diversity remains unclear. Lineage diversification rates through time exhibit no shifts associated with the end Cretaceous mass extinction, but there is a global decrease in lineage diversification rates 50 Ma that occurs during a period when morphological disparity among fossil acanthomorphs increases sharply. Analysis of clade-specific shifts in diversification rates reveal that the hyperdiversity of living acanthomorphs is highlighted by several rapidly radiating lineages including tunas, gobies, blennies, snailfishes, and Afro-American cichlids. These lineages with high diversification rates are not associated with a single habitat type, such as coral reefs, indicating there is no single explanation for the success of acanthomorphs, as exceptional bouts of diversification have occurred across a wide array of marine and freshwater habitats.

  • Actinopterygii
  • Cichlidae
  • Percomorpha
  • Teleostei

Footnotes

  • ↵1To whom correspondence should be addressed. E-mail: thomas.near{at}yale.edu.
  • Author contributions: T.J.N., A.D., R.I.E., W.L.S., J.A.M., M.F., and P.C.W. designed research; T.J.N., A.D., R.I.E., B.P.K., W.L.S., K.L.K., J.A.M., S.A.P., F.T.B., M.F., and P.C.W. performed research; T.J.N., A.D., R.I.E., B.P.K., K.L.K., S.A.P., F.T.B., M.F., and P.C.W. analyzed data; and T.J.N., A.D., R.I.E., and P.C.W. wrote the paper.

  • The authors declare no conflict of interest.

  • This article is a PNAS Direct Submission.

  • Data deposition: The sequences reported in this paper have been deposited in the GenBank database (accession nos. KF139346–KF141634).

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1304661110/-/DCSupplemental.

Freely available online through the PNAS open access option.

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Spiny-rayed fish phylogeny and diversification
Thomas J. Near, Alex Dornburg, Ron I. Eytan, Benjamin P. Keck, W. Leo Smith, Kristen L. Kuhn, Jon A. Moore, Samantha A. Price, Frank T. Burbrink, Matt Friedman, Peter C. Wainwright
Proceedings of the National Academy of Sciences Jul 2013, 201304661; DOI: 10.1073/pnas.1304661110

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Spiny-rayed fish phylogeny and diversification
Thomas J. Near, Alex Dornburg, Ron I. Eytan, Benjamin P. Keck, W. Leo Smith, Kristen L. Kuhn, Jon A. Moore, Samantha A. Price, Frank T. Burbrink, Matt Friedman, Peter C. Wainwright
Proceedings of the National Academy of Sciences Jul 2013, 201304661; DOI: 10.1073/pnas.1304661110
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