Search Results - "Hedges, S B"

Rapid evolution to terrestrial life in Jamaican crabs by Schubart, Christoph D, Diesel, Rudolf, Hedges, S. Blair

“…Crabs of the family Grapsidae are abundant organisms in most intertidal communities. However, relatively few species live in complete independence of the sea…”
Get full text

Molecular Evidence for the Early Colonization of Land by Fungi and Plants by Heckman, Daniel S., Geiser, David M., Eidell, Brooke R., Stauffer, Rebecca L., Kardos, Natalie L., Hedges, S. Blair

“…The colonization of land by eukaryotes probably was facilitated by a partnership (symbiosis) between a photosynthesizing organism (phototroph) and a fungus…”
Get full text

The number of replications needed for accurate estimation of the bootstrap P value in phylogenetic studies by HEDGES, S. B

Get full text

Molecular Evidence for the Origin of Birds by Hedges, S. Blair

“…The major groups of amniote vertebrates appeared during a relatively short time span at the end of the Paleozoic Era, a fact that has caused difficulty in…”
Get full text

A Molecular Phylogeny of Reptiles by Hedges, S. Blair, Poling, Laura L.

“…The classical phylogeny of living reptiles pairs crocodilians with birds, tuataras with squamates, and places turtles at the base of the tree. New evidence…”
Get full text

Human and Ape Molecular Clocks and Constraints on Paleontological Hypotheses by Stauffer, R. L., Walker, A., Ryder, O. A., Lyons-Weiler, M., Hedges, S. Blair

“…Although the relationships of the living hominoid primates (humans and apes) are well known, the relationships of the fossil species, times of divergence of…”
Get full text

Continental breakup and the ordinal diversification of birds and mammals by Hedges, S. Blair, Parker, Patrick H, Sibley, Charles G, Kumar, Sudhir

“…The classical hypothesis for the diversification of birds and mammals proposes that most of the orders diverged rapidly in adaptive radiations after the…”
Get full text

The origin and evolution of model organisms by Hedges, S. Blair

“…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,…”
Get full text

Afrotheria: Plate Tectonics Meets Genomics by Hedges, S. Blair

“…Afrotheria is one of the most remarkable hypotheses in mammal evolution. It suggests that one-third of the orders of placental mammals form an ancient group…”
Get full text

Making the impossible possible: rooting the tree of placental mammals by Teeling, Emma C, Hedges, S Blair

“…Untangling the root of the evolutionary tree of placental mammals has been nearly an impossible task. The good news is that only three possibilities are…”
Get full text

The chromosomes of terraranan frogs. Insights into vertebrate cytogenetics by Schmid, M, Steinlein, C, Bogart, J P, Feichtinger, W, León, P, La Marca, E, Díaz, L M, Sanz, A, Chen, S-H, Hedges, S B

Get more information

Precision of molecular time estimates by Blair Hedges, S., Kumar, Sudhir

“…Molecular clocks are used to estimate the time of divergence of genes and species and have helped illuminate the evolutionary history of life. In a recent…”
Get full text

Genomic clocks and evolutionary timescales by Blair Hedges, S., Kumar, Sudhir

“…For decades, molecular clocks have helped to illuminate the evolutionary timescale of life, but now genomic data pose a challenge for time estimation methods…”
Get full text

Phylogeny and biogeography of ratite birds inferred from DNA sequences of the mitochondrial ribosomal genes by van Tuinen, M, Sibley, C G, Hedges, S B

“…The origin of the flightless ratite birds of the southern continents has been debated for over a century. Whether dispersal or vicariance (continental breakup)…”
Get full text

The hemiphractid frogs. Phylogeny, embryology, life history, and cytogenetics by Schmid, M, Steinlein, C, Bogart, J P, Feichtinger, W, Haaf, T, Nanda, I, del Pino, E M, Duellman, W E, Hedges, S B

Get more information

Convergence and divergence in the evolution of aquatic birds by Tuinenf, Marcel Van, Butvill, Dave Brian, Kirsch, John A. W., Hedges, S. Blair

“…Aquatic birds exceed other terrestrial vertebrates in the diversity of their adaptations to aquatic niches. For many species this has created difficulty in…”
Get full text

A molecular timescale for vertebrate evolution by Hedges, S. Blair, Kumar, Sudhir

“…A timescale is necessary for estimating rates of molecular and morphological change in organisms and for interpreting patterns of macroevolution and…”
Get full text

Calibration of avian molecular clocks by van Tuinen, M, Hedges, S B

“…Molecular clocks can be calibrated using fossils within the group under study (internal calibration) or outside of the group (external calibration). Both types…”
Get full text

Molecules vs. morphology in avian evolution: the case of the "pelecaniform" birds by Hedges, S B, Sibley, C G

“…The traditional avian Order Pelecaniformes is composed of birds with all four toes connected by a web. This "totipalmate" condition is found in ca. 66 living…”
Get full text

Molecular evidence for a terrestrial origin of snakes by Vidal, Nicolas, Hedges, S. Blair

“…Biologists have debated the origin of snakes since the nineteenth century. One hypothesis suggests that snakes are most closely related to terrestrial lizards,…”
Get full text