Xenopus Anatomical Ontology
The Xenopus Anatomical Ontology describes Xenopus anatomy and development as a controlled vocabulary of terms, organized in a graphical structure. Tissues are shown as being part of other tissues and the timing of their development is indicated by start and end stages. The lineage of tissues is represented by develops from relationships between different tissues at different developmental stages. Many items have been classified according to the Common Anatomy Reference Ontology. The ontology is listed at the Open Biomedical Ontologies (OBO Foundry).
You can search for Xenopus gene expression patterns with terms from the anatomical ontology.
Segerdell E, Bowes JB, Pollet N, Vize PD. An ontology for Xenopus anatomy and development. BMC Developmental Biology (2008) 8:92.
Other anatomical ontologies