S B Hedges

Summary

Affiliation: Pennsylvania State University
Country: USA

Publications

  1. ncbi request reprint Continental breakup and the ordinal diversification of birds and mammals
    S B Hedges
    Department of Biology and Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, 16802, USA
    Nature 381:226-9. 1996
  2. ncbi request reprint Calibration of avian molecular clocks
    M Van Tuinen
    Department of Biology, Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, PA 16802, USA
    Mol Biol Evol 18:206-13. 2001
  3. ncbi request reprint Molecular evidence for the early colonization of land by fungi and plants
    D S Heckman
    Astrobiology Research Center and Department of Biology, Pennsylvania State University, University Park, PA 16802, USA
    Science 293:1129-33. 2001
  4. pmc Phylogenetic relationships of the hoatzin, an enigmatic South American bird
    S B Hedges
    Department of Biology, Pennsylvania State University, University Park 16802, USA
    Proc Natl Acad Sci U S A 92:11662-5. 1995
  5. pmc A genomic timescale for the origin of eukaryotes
    S B Hedges
    Astrobiology Research Center and Department of Biology, 208 Mueller Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
    BMC Evol Biol 1:4. 2001
  6. ncbi request reprint A molecular phylogeny of reptiles
    S B Hedges
    Department of Biology, Institute of Molecular Evolutionary Genetics, and Astrobiology Research Center, 208 Mueller Laboratory, Pennsylvania State University, University Park, PA 16802, USA
    Science 283:998-1001. 1999
  7. ncbi request reprint Human and ape molecular clocks and constraints on paleontological hypotheses
    R L Stauffer
    Department of Biology and Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, PA 16802, USA
    J Hered 92:469-74. 2001
  8. ncbi request reprint Evolutionary history of the enolase gene family
    M R Tracy
    Department of Biology, Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, PA 16802, USA
    Gene 259:129-38. 2000

Collaborators

Detail Information

Publications8

  1. ncbi request reprint Continental breakup and the ordinal diversification of birds and mammals
    S B Hedges
    Department of Biology and Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, 16802, USA
    Nature 381:226-9. 1996
    ..This suggests that continental breakup may have been an important mechanism in the ordinal diversification of birds and mammals...
  2. ncbi request reprint Calibration of avian molecular clocks
    M Van Tuinen
    Department of Biology, Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, PA 16802, USA
    Mol Biol Evol 18:206-13. 2001
    ..The new time estimates are concordant with a continental breakup model for the origin of ratites...
  3. ncbi request reprint Molecular evidence for the early colonization of land by fungi and plants
    D S Heckman
    Astrobiology Research Center and Department of Biology, Pennsylvania State University, University Park, PA 16802, USA
    Science 293:1129-33. 2001
    ....
  4. pmc Phylogenetic relationships of the hoatzin, an enigmatic South American bird
    S B Hedges
    Department of Biology, Pennsylvania State University, University Park 16802, USA
    Proc Natl Acad Sci U S A 92:11662-5. 1995
    ..The results indicate that the hoatzin is most closely related to the typical cuckoos and that the divergence occurred at or near the base of the cuculiform phylogenetic tree...
  5. pmc A genomic timescale for the origin of eukaryotes
    S B Hedges
    Astrobiology Research Center and Department of Biology, 208 Mueller Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
    BMC Evol Biol 1:4. 2001
    ..We used refined methods of sequence alignment, site selection, and time estimation to address these questions with protein sequences from complete genomes of prokaryotes and eukaryotes...
  6. ncbi request reprint A molecular phylogeny of reptiles
    S B Hedges
    Department of Biology, Institute of Molecular Evolutionary Genetics, and Astrobiology Research Center, 208 Mueller Laboratory, Pennsylvania State University, University Park, PA 16802, USA
    Science 283:998-1001. 1999
    ..Morphological and paleontological evidence for this molecular phylogeny is unclear. Molecular time estimates support a Triassic origin for the major groups of living reptiles...
  7. ncbi request reprint Human and ape molecular clocks and constraints on paleontological hypotheses
    R L Stauffer
    Department of Biology and Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, PA 16802, USA
    J Hered 92:469-74. 2001
    ..3 +/- 1.3 million years ago (orangutan, 33 genes), and 14.9 +/- 2.0 million years ago (gibbon, 27 genes). Based on these molecular constraints, we find that several proposed phylogenies of fossil hominoid taxa are unlikely to be correct...
  8. ncbi request reprint Evolutionary history of the enolase gene family
    M R Tracy
    Department of Biology, Institute of Molecular Evolutionary Genetics, Pennsylvania State University, University Park, PA 16802, USA
    Gene 259:129-38. 2000
    ..Two copies of enolase, designated alpha(1) and alpha(2), were found in the trout and are presumed to be the result of a genome duplication event...