TreeBASE is a repository of phylogenetic information, specifically user-submitted phylogenetic trees and the data used to generate them. TreeBASE accepts all types of phylogenetic data (e.g., trees of species, trees of populations, trees of genes) representing all biotic taxa. Data in TreeBASE are exposed to the public if they are used in a publication that is in press or published in a peer-reviewed scientific journal, book, conference proceedings, or thesis. Data used in publications that are in preparation or in review can be submitted to TreeBASE but are only available to the authors, publication editors, or reviewers using a special access code.
Treebase is covered by Thomson Reuters Data Citation Index. In previous years the database has been hosted by the Yale Peabody Museum, the San Diego Supercomputer Center, the University at Buffalo, Harvard University, Leiden University, and the University of California, Davis. Development of TreeBASE is hosted at SourceForge. All source code can be downloaded from the TreeBASE subversion repository at SourceForge under a BSD license.