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Lagrange (Python)

Lagrange is a Python package implementing likelihood models for geographic range evolution on phylogenetic trees, with methods for inferring rates of dispersal and local extinction and ancestral ranges.

This software implements methods described in: Ree, R H and S A Smith. 2008. Maximum likelihood inference of geographic range evolution by dispersal, local extinction, and cladogenesis. Systematic Biology 57(1):4-14.

See also: Ree, R H, B R Moore, C O Webb, and M J Donoghue. 2005. A likelihood framework for inferring the evolution of geographic range on phylogenetic trees. Evolution 59(11):2299-2311.

Analysis scripts can be created using the web-based configuration tool at This tool lets you configure and download your analysis as a Python script which is then run on your own computer.

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