{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T13:39:31Z","timestamp":1792676371248,"version":"4.5.0"},"reference-count":34,"publisher":"The Company of Biologists","issue":"15","license":[{"start":{"date-parts":[[2020,9,5]],"date-time":"2020-09-05T00:00:00Z","timestamp":1599264000000},"content-version":"vor","delay-in-days":1131,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0"}],"funder":[{"DOI":"10.13039\/100009633","name":"Eunice Kennedy Shriver National Institute of Child Health and Human Development","doi-asserted-by":"publisher","award":["R01HDO81326"],"award-info":[{"award-number":["R01HDO81326"]}],"id":[{"id":"10.13039\/100009633","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2017,8,1]]},"abstract":"<jats:p>The embryos and tadpoles of the frog Xenopus are increasingly important subjects for studies of the development of the head and face \u2013 studies that are providing novel and crucial insight into the causes and prevention of a suite of devastating birth defects, as well as basic evolutionary and developmental biology. However, many studies are conducted on a range of embryonic stages that are not fully represented in the beloved Xenopus resource, Nieuwkoop and Faber's classic Normal Table of Xenopus laevis (Daudin). The lack of standardized images at these stages acts as a barrier to the efficient and accurate representation and communication of experimental methodology and expression data. To fill this gap, we have created 27 new high-quality illustrations. Like their oft-used predecessors from Nieuwkoop and Faber, these drawings can be freely downloaded and used, and will, we hope, serve as an essential resource for this important model system.<\/jats:p>","DOI":"10.1242\/dev.151308","type":"journal-article","created":{"date-parts":[[2017,8,1]],"date-time":"2017-08-01T11:25:19Z","timestamp":1501586719000},"page":"2708-2713","source":"Crossref","is-referenced-by-count":25,"title":["The Zahn drawings: new illustrations of <i>Xenopus<\/i> embryo and tadpole stages for studies of craniofacial development"],"prefix":"10.1242","volume":"144","author":[{"given":"Natalya","family":"Zahn","sequence":"first","affiliation":[{"name":"1 www.natalya.com, Cambridge, MA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7292-8084","authenticated-orcid":false,"given":"Michael","family":"Levin","sequence":"additional","affiliation":[{"name":"Tufts Center for Regenerative and Developmental Biology, Tufts University 2 Department of Biology and \u2008 , Medford , MA \u2008 , USA"},{"name":"02155 2 Department of Biology and \u2008 , Medford , MA \u2008 , USA"},{"name":"Allen Discovery Center at Tufts University 3 , Medford , MA \u2008 , USA"},{"name":"02155 3 , Medford , MA \u2008 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2024-9746","authenticated-orcid":false,"given":"Dany Spencer","family":"Adams","sequence":"additional","affiliation":[{"name":"Tufts Center for Regenerative and Developmental Biology, Tufts University 2 Department of Biology and \u2008 , Medford , MA \u2008 , USA"},{"name":"02155 2 Department of Biology and \u2008 , Medford , MA \u2008 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","reference":[{"key":"2024061213311168600_DEV151308C1","doi-asserted-by":"publisher","first-page":"164","DOI":"10.1002\/dvg.22007","article-title":"The Hitchhiker's guide to Xenopus genetics","volume":"50","author":"Abu-Daya","year":"2012","journal-title":"Genesis"},{"key":"2024061213311168600_DEV151308C2","doi-asserted-by":"publisher","first-page":"1461","DOI":"10.1089\/ten.tea.2008.0080","article-title":"A new tool for tissue engineers: ions as regulators of morphogenesis during development and regeneration","volume":"14","author":"Adams","year":"2008","journal-title":"Tissue Eng."},{"key":"2024061213311168600_DEV151308C3","doi-asserted-by":"publisher","first-page":"851","DOI":"10.1387\/ijdb.140207ml","article-title":"Optogenetics in Developmental Biology: using light to control ion flux-dependent signals in Xenopus embryos","volume":"58","author":"Adams","year":"2014","journal-title":"Int. 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