strap is an R package designed to perform stratigraphic analysis of phylogenies, including basic time-scaling, visualisation of time-scaled trees, and applying stratigraphic congruence metrics.

You can install strap in R via CRAN with:

install.packages("strap", dependencies = TRUE)

Or from github with:


And load it into memory using:


Basic help can be found with:


And clicking on the Index link at the base of the help file will reveal links to every available function.


Bell, M. A. and Lloyd, G. T., 2015. strap: an R package for plotting phylogenies against stratigraphy and assessing their stratigraphic congruence. Palaeontology, 58, 379-389.

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strap documentation built on June 13, 2022, 9:05 a.m.