Despite their dominance in phylogenetic inference, it is evident that both are biologically unrealistic and that the real evolutionary process lies between these two extremes.
Fortunately, intermediate models employing relaxed molecular clocks have been described.
Integrative taxonomy: a multisource approach to exploring biodiversity.
A mitochondrial genome phylogeny of termites (Blattodea : Termitoidae): robust support for interfamilial relationships and molecular synapomorphies define major clades. | Chouvenc, T., Li, H.-F., Austin, J., Bordereau, C., Bourguignon, T., Cameron, S.
The molecular clock was first tested in 1962 on the hemoglobin protein variants of various animals, and is commonly used in molecular evolution to estimate times of speciation or radiation.
It is sometimes called a gene clock or an evolutionary clock.
Sequence-based species delimitation for the DNA taxonomy of undescribed insects. | Ronquist, F., Teslenko, M., van der Mark, P., Ayres, D.
Mr Bayes 3.2: efficient Bayesian phylogenetic inference and model choice across a large model space.
Tertiary fossil species of the Rhinotermitidae (Isoptera), phylogeny of genera, and reciprocal phylogeny of associated Flagellata (Protozoa) and the Staphylinidae (Coleoptera).