The phrase "age of the extant" is correct and usable in written English.
It can be used in contexts discussing the current period or era in relation to existing or surviving entities, such as species, texts, or artifacts.
Example: "In the age of the extant, we must consider how modern technology impacts our understanding of historical artifacts."
Alternatives: "era of the existing" or "period of the surviving".
Most surprisingly, we obtained a time estimate for the origin of the Mascarene clade that significantly exceeds the geological ages of the extant emerged islands.
A magnetic-polarity time scale for the stratigraphy of normal and reversed magnetic stripes can be constructed back as far as 280 260 million years ago, which is the age of the oldest extant segment of ocean floor.
Because of the age of the oldest extant Hawaiian Island (Nihoa; 7.3 Ma [ 14, 15, 47]) and because the Pritchardia colonization of the Hawaiian Islands was estimated to occur between 3.5-8 meanmean stem to crown-stem ages [ 31]), an average of three new species would have had to form every million years to account for the 24 currently recognized species in the radiation.
The age of the LCA of extant NP was estimated as 22.9 Ma 15.8 33.00) (fig. 4).
We tested for homogeneity among the haplotype distribution of the 53 pooled samples of ancient Danes from the Iron Age to the Medieval Age and the extant Danes sample with a G-test.
Allele sharing between species provides evidence for introgressive hybridization [4], [5], but the unknown age of many extant Indo-Pacific species [6] makes it often difficult to distinguish between hybridization and incomplete lineage sorting (i.e. shared ancestral polymorphism) [5], [7].
Using the fossil record to estimate the age of the last common ancestor of extant primates.
Although some extant species have been found in sediments of Pleistocene age, given the uncertainty of the ages of these sediments and the magnitude of the 41 million year record covered by the extinct taxa sampled, the ages of all extant taxa were set to the present day.
To estimate the age of the allodapine root node (earliest divergence among extant clades) we employed three calibration points.
We dated the last common ancestor of the extant Eurasian beaver mitochondrial genomes to almost twice the age than estimated before, around 210,000 ya (CI: 110,000 340,00 ya).
