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Vertebrate Gastrulation: Unity in Teratogenesis? Axial Clefts in a Historical Perspective

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image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

Blocking epiboly during gastrulation in teleosts and amphibians leads to so-called ring-embryos that have a uniform head and tail end while the trunk consists of two separate lateral halves forming a ring around the persisting yolk plug. Comparable malformations probably due to delayed gastrulation can be traced throughout the chordates from amphioxus to man, revealing a fundamental unity in morphogenesis. The present contribution describes the discovery and early interpretation of ring-embryos in the Anamnia and recalls a mistaken fate map derived from them that must have substantially delayed the discovery of the amphibian organizer effect.

Affiliations: 1: Institut für Biologie I (Zoologie), Albertstr. 21a, D-79104 Freiburg, Germany


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