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Standards > terminology artifact > bsg-s000034

ready Xenopus Anatomy Ontology


General Information
The Xenopus Anatomical Ontology (XAO) describes Xenopus anatomy and embryological development using a 'controlled vocabulary' of anatomy terms that are organized in an hierarchy with a graphical structure. XAO terms describe gene expression, and the XAO is constantly being updated in response to the latest published Xenopus research.

Collected/Recommended By

This record is maintained by xenbase

Record updated: Nov. 30, 2016, 10:44 p.m. by The FAIRsharing Team.

In Collections



    No tools defined


No XSD schemas defined

XAO Ontology Display

View in BioPortal.

Disclaimer: This widget assumes the availability of the ontology resources in the NCBO BioPortal.

Related Standards

Reporting Guidelines

No guidelines defined

Terminology Artifacts

No semantic standards defined

Models and Formats

No syntax standards defined

Implementing Databases (2)
Bgee DataBase for Gene Expression Evolution
Bgee is a database to retrieve and compare gene expression patterns in multiple animal species, produced from multiple data types (RNA-Seq, Affymetrix, in situ hybridization, and EST data). Bgee is based exclusively on curated "normal", healthy, expression data (e.g., no gene knock-out, no treatment, no disease), to provide a comparable reference of normal gene expression. Bgee produces calls of presence/absence of expression, and of differential over-/under-expression, integrated along with information of gene orthology, and of homology between organs. This allows comparisons of expression patterns between species.

Xenopus laevis and tropicalis biology and genomics resource
Xenbase is the model organism database for Xenopus laevis and X. (Silurana) tropicalis. It contains genomic, development data and community information for Xenopus research. It includes gene expression patterns that incorporate image data from the literature, large scale screens and community submissions.

Implementing Policies

This record is not implemented by any policy.


Record Maintainer

  • This record is maintained by xenbase



Grant Number(s)

  • P41 HD064556 (US National Institute of Child Health and Development (NICHD))


Enhanced XAO: the ontology of Xenopus anatomy and development underpins more accurate annotation of gene expression and queries on Xenbase.

Segerdell E,Ponferrada VG,James-Zorn C,Burns KA,Fortriede JD,Dahdul WM,Vize PD,Zorn AM
J Biomed Semantics 2013

View Paper (PubMed) View Paper (DOI)

An ontology for Xenopus anatomy and development.

Segerdell E,Bowes JB,Pollet N,Vize PD
BMC Dev Biol 2008

View Paper (PubMed) View Paper (DOI)