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XB-STAGE-36
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Name: NF stage 18
XAO ID: 1000034 Definition: "Nieuwkoop and Faber stage 18, corresponding to an embryo of age 19 hr 45 min at 22-24 Celsius and having the following external morphological criteria: Neural groove stage. Anterior part of neural plate narrow, more or less club-shaped, often narrower towards rostral end. Parallel neural folds in trunk region very close to each other, not yet touching. Length: 1.5 - 1.6 mm." |
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| Preceded By: NF stage 17 | Succeeded By: NF stage 19 |