This is a development version
of the Open Tree of Life website!
Data and services may be out of date or
untested. The production site (the place to
do real work) is

Synthesis release



Release notes

A fuller release history (including early draft versions) is available in the germinator documentation:

Open Tree of Life version 13.4

Version 13.4 of the synthetic tree was generated on 18 June 2021 using the propinquity pipeline.

On 27-July-2021, MTH corrected errors in the tree identifiers in the subproblems/contesting_trees.json file. This method for making these corrections automatically in the propinquity builds was committed in this commit.


There are two downloads. The first (smaller download) contain only tree and annotations files. The second (larger download) is the full output from the synthesis procedure, including documentation. You can also browse the full output.

  • Tree and annotations : Several versions of the synthetic tree, along with the annotations file. See the enclosed README for details. (compressed tar archive; 36 Mbytes)
  • All pipeline outputs : Outputs and documentation from all stages of the synthesis pipeline. Or, you can browse the output rather than downloading. (compressed tar archive; 561 Mbytes)

Release notes

Changes in inputs

  • based on OTT 3.3 instead of OTT 3.2
  • 23 new input trees, and 1 input tree removed

Changes in output

total tips23919162392042126
tips from phylogeny87740940286288
internal nodes in taxonomy22406322409835
internal nodes from phylogeny80048839843936
broken taxa56655883218