Zahn Drawings 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 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted 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 [email@example.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 (2021).
2) Cite Xenbase as the source of the illustrations: Xenbase (www.xenbase.org RRID:SCR_003280), and
3) Cite this article: The Zahn drawings: new illustrations of Xenopus embryos...
Want to use the Zahn drawings in a commercial publication, like a text book or science magazine?
• Request permission from the Illustrator Natalya Zahn [firstname.lastname@example.org] to use any illustration in a commercial publication (Fees apply).
Grouped stage image sets:
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* 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.
Individual NF stage images:
Click on image to view high-resolustion enlargement in new tab. Secondary-click and "save image" or "save page as" to download enlargement.
Last Updated: 2019-09-01