Skip to content


Repository files navigation

Build Status

Xenopus Phenotype Ontology

The Xenopus Phenotype Ontology represents and standardizes phenotypes occurring throughout the development of the African frogs Xenopus laevis and tropicalis. It supports the annotation of phenotypes in Xenbase and is designed to integrate Xenopus data with genotype, phenotype, and disease data across species.

Browse and search XPO at the Ontology Lookup Service.


Stable release versions

The latest version of the ontology can always be found at:

Editors' version

Editors of this ontology should use the edit version: src/ontology/xpo-edit.owl


Please use this GitHub repository's issue tracker to request new terms/classes or report errors or specific concerns related to the ontology.


This ontology repository was created using the Ontology Development Kit.