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Image sets of Xenopus laevis development

Staging based on Normal Table of Xenopus laevis A systematic and chronological survey of the development from the fertilized egg till the end of metamorphosis: Edited by PD Nieuwkoop and J Faber (1994).

Illustrations by Natalya Zahn.

These drawings closely match the aesthetic of the familiar NF stage series.

Importantly, the illustrations are Open Access, distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial use, distribution and reproduction in any medium provided that the original work is properly attributed.

What this means to you:

• Free use of any/all of the Zahn drawings for non-commercial purposes, such as lecture slides, handouts, lab notebooks, lab worksheets, posters, power-point slides.
• Free use of up to 6 of the Zahn drawings per published article. The same image can be re-used multiple times in figures and diagrams, but you are limited to 6 unique images per article.

Want to use more than 7 images?

• Contact illustrator Natalya Zahn [natalya@natalya.com] for permission to use 7 or more illustrations (Fees may apply).

To use the Zahn drawings in your published work, do these 3 things:

1) Write this in captions of any figures: Xenopus illustrations © Natalya Zahn (2022).

2) Cite Xenbase as the source of the illustrations: Xenbase (www.xenbase.org RRID:SCR_003280), and

3) Cite this article: Zahn et al., Normal Table of Xenopus development: a new graphical resource. Development (2022) 149 (14): dev200356. https://doi.org/10.1242/dev.200356.
Click to go to article at Development.

Want to use the Zahn drawings in a commercial publication, like a text book or science magazine?

• Request permission from the Illustrator Natalya Zahn [natalya@natalya.com] to use any illustration in a commercial publication (Fees apply).

Click here to view and download the accompanying Xenopus staging poster.

Or, click here to access the PDF with supplementary information, PDF+SI (poster is the last page).

Individual Zahn drawing image sets: NF1-NF18

Individual Zahn drawing image sets: NF19-NF39

Individual Zahn drawing image sets: NF40-NF66

Previously published Zahn drawings:

XenHead images:

The Zahn drawings: new illustrations of Xenopus embryo and tadpole stages for studies of craniofacial development

Zahn, Levin, and Adams. Development. 2017 Aug 1;144(15):2708-2713. doi: 10.1242/dev.151308.

* Please note that the grouped image sets are a composite of individual images. They are not to be reproduced for commercial purposes without permission from the copyright holder.

Cleavage stage X. laevis embryos