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- Publications
- Influence
A genomic timescale of prokaryote evolution: insights into the origin of methanogenesis, phototrophy, and the colonization of land
- F. Battistuzzi, A. Feijão, S. Hedges
- Biology, Medicine
- BMC Evolutionary Biology
- 9 November 2004
BackgroundThe timescale of prokaryote evolution has been difficult to reconstruct because of a limited fossil record and complexities associated with molecular clocks and deep divergences. However,… Expand
Molecular Evidence for the Early Colonization of Land by Fungi and Plants
- D. Heckman, D. Geiser, B. R. Eidell, R. L. Stauffer, N. Kardos, S. Hedges
- Biology, Medicine
- Science
- 10 August 2001
The colonization of land by eukaryotes probably was facilitated by a partnership (symbiosis) between a photosynthesizing organism (phototroph) and a fungus. However, the time when colonization… Expand
A molecular timescale of eukaryote evolution and the rise of complex multicellular life
- S. Hedges, J. Blair, M. L. Venturi, Jason L Shoe
- Biology, Medicine
- BMC Evolutionary Biology
- 28 January 2004
BackgroundThe pattern and timing of the rise in complex multicellular life during Earth's history has not been established. Great disparity persists between the pattern suggested by the fossil record… Expand
Molecular evidence for multiple origins of Insectivora and for a new order of endemic African insectivore mammals.
- M. Stanhope, V. Waddell, +5 authors M. Springer
- Biology, Medicine
- Proceedings of the National Academy of Sciences…
- 18 August 1998
The traditional views regarding the mammalian order Insectivora are that the group descended from a single common ancestor and that it is comprised of the following families: Soricidae (shrews),… Expand
Calibration of avian molecular clocks.
- M. van Tuinen, S. Hedges
- Biology, Medicine
- Molecular biology and evolution
- 1 February 2001
Molecular clocks can be calibrated using fossils within the group under study (internal calibration) or outside of the group (external calibration). Both types of calibration have their advantages… Expand
Molecular phylogeny and divergence times of deuterostome animals.
The phylogenetic relationships among deuterostome animals have been debated for many years, and a diversity of hypotheses have been proposed based on both morphological and molecular data. Here we… Expand
The Impact of Conservation on the Status of the World’s Vertebrates
- M. Hoffmann, C. Hilton-Taylor, +171 authors S. Stuart
- Biology, Medicine
- Science
- 10 December 2010
Assessing Biodiversity Declines Understanding human impact on biodiversity depends on sound quantitative projection. Pereira et al. (p. 1496, published online 26 October) review quantitative… Expand
Phylogenetic relationships of amphibian families inferred from DNA sequences of mitochondrial 12S and 16S ribosomal RNA genes.
- J. M. Hay, I. Ruvinsky, S. Hedges, L. Maxson
- Biology, Medicine
- Molecular biology and evolution
- 1 September 1995
Nucleotide sequence comparisons were used to investigate ordinal and familial relationships within the class Amphibia. Approximately 850 base pairs of the mitochondrial 16S ribosomal RNA (rRNA) gene… Expand
The number of replications needed for accurate estimation of the bootstrap P value in phylogenetic studies.
- S. Hedges
- Biology, Medicine
- Molecular biology and evolution
- 1 March 1992
The bootstrap is a statistical method for obtaining a nonparametric estimate of error (Efron 1979, 1982). Felsenstein ( 1985) was the first to apply this method to phylogeny estimation, and his… Expand
The colonization of land by animals: molecular phylogeny and divergence times among arthropods
- D. Pisani, L. L. Poling, Maureen Lyons-Weiler, S. Hedges
- Biology, Medicine
- BMC Biology
- 19 January 2004
BackgroundThe earliest fossil evidence of terrestrial animal activity is from the Ordovician, ~450 million years ago (Ma). However, there are earlier animal fossils, and most molecular clocks suggest… Expand