• Publications
  • Influence
Rapid evolution to terrestrial life in Jamaican crabs
Crabs of the family Grapsidae are abundant organisms in most intertidal communities. However, relatively few species live in complete independence of the sea. Of those species that do, Jamaica's nineExpand
New World direct-developing frogs (Anura: Terrarana): Molecular phylogeny, classification, biogeography, and conservation
New World frogs recently placed in a single, enormous family (Brachycephalidae) have direct development and reproduce on land, often far away from water. DNA sequences from mitochondrial and nuclearExpand
A genomic timescale of prokaryote evolution: insights into the origin of methanogenesis, phototrophy, and the colonization of land
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
The origin and evolution of model organisms
  • S. Hedges
  • Biology, Medicine
  • Nature Reviews Genetics
  • 1 November 2002
The phylogeny and timescale of life are becoming better understood as the analysis of genomic data from model organisms continues to grow. As a result, discoveries are being made about the earlyExpand
A molecular timescale of eukaryote evolution and the rise of complex multicellular life
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 recordExpand
The phylogeny of squamate reptiles (lizards, snakes, and amphisbaenians) inferred from nine nuclear protein-coding genes.
Squamate reptiles number approximately 8000 living species and are a major component of the world's terrestrial vertebrate diversity. However, the established relationships of the higher-level groupsExpand
Divergence time estimates for the early history of animal phyla and the origin of plants, animals and fungi
In the past, molecular clocks have been used to estimate divergence times among animal phyla, but those time estimates have varied widely (1200–670 million years ago, Ma). In order to obtain timeExpand
Molecular evidence for multiple origins of Insectivora and for a new order of endemic African insectivore mammals.
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
Early evolution of the venom system in lizards and snakes
Among extant reptiles only two lineages are known to have evolved venom delivery systems, the advanced snakes and helodermatid lizards (Gila Monster and Beaded Lizard). Evolution of the venom systemExpand
Major Caribbean and Central American frog faunas originated by ancient oceanic dispersal
Approximately one-half of all species of amphibians occur in the New World tropics, which includes South America, Middle America, and the West Indies. Of those, 27% (801 species) belong to a largeExpand