Staging Xenopus laevis embryos and tadpoles

Xenbase has 2 new open access resources help everyone stage Xenopus embryos: a new series of drawings in the classic Nieuwkoop and Faber style, and a Landmarks Table.

  1. The Zahn drawings are accessible on Xenbase, through an attributable, non-commercial creative commons license (CC BY-NC 4.0).

The Zahn drawings can be used and downloaded from here: Zahn Drawings of Xenopus laevis Development

To reproduce any of these images please use the following attribution: Illustration © 2021 Natalya Zahn, CC BY-NC 4.0, and cite Xenbase (http://www.xenbase.org, RRID:SCR_003280) and this paper: Zahn et al., Normal Table of Xenopus development: a new graphical resource. Development (2022) 149 (14): dev200356. .

A poster of the Zahn drawings showing key stages of Xenopus development is available as supplementary material in the online version of this article at Normal Table of Xenopus development: a new graphical resource | Development | The Company of Biologists.

See the article on the Development website: Normal Table of Xenopus development: a new graphical resource | Development | The Company of Biologists

  1. The Landmarks Table is a simple yet distinctive combination of ‘external’ and ‘internal’ morphological traits, in addition to gene markers for stage specific tissues that can be used to distinguish each NF stage.

The table is on Xenbase (Xenopus staging landmarks) and has live links that direct to (1) gene pages, with links to extensive gene-specific expression data, genomic resources and orthologs, and to (2) XAO pages, with tissue-specific gene expression data.

This online version of the Normal Table is dynamic, and will be updated with the latest molecular and anatomical data.