The molecular clock presents a means of estimating evolutionary rates and timescales using
genetic data. These estimates can lead to important insights into evolutionary processes and …

Recent controversy about the use of the vertebrate fossil record for external calibration of
molecular clocks centers on two issues, the number of dates used for calibration and the …

The need for robust estimates of times of divergence is essential for downstream analyses,
yet assessing this robustness is still rare. We generated a time-calibrated genus-level …

The Quaternary was a time of extensive evolution among mammals. Most living species
arose at this time, and many of them show adaptations to peculiarly Quaternary …

Although still controversial, estimation of divergence times using molecular data has
emerged as a powerful tool to examine the tempo and mode of evolutionary change. Two …

Phylogenetic estimates of evolutionary timescales can be obtained from nucleotide
sequence data using the molecular clock. These estimates are important for our …

Background Molecular dating has gained ever-increasing interest since the molecular clock
hypothesis was proposed in the 1960s. Molecular dating provides detailed temporal …

Molecular clock methods allow biologists to estimate divergence times, which in turn play an
important role in comparative studies of many evolutionary processes. It is well known that …

To examine Holarctic snake dispersal, we inferred a phylogenetic tree from four mtDNA
genes and one scnDNA gene for most species of the Old World (OW) and New World (NW) …

Estimates of species divergence times using DNA sequence data are playing an
increasingly important role in studies of evolution, ecology and biogeography. Most work …