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Summary Stage Literature (353) Attributions Wiki
XB-STAGE-40

Name: NF stage 22

XAO ID: 1000038

Definition: "Nieuwkoop and Faber stage 22, corresponding to an embryo of age 24 hr at 22-24 Celsius and having the following external morphological criteria: Distinct protrusion of eyes. Initial groove between jaw- and gill-areas only at latero-dorsal side. Lateral and ventral outlines of embryo slightly concave. Anal opening displaced to ventral side. Vitelline membrane becoming wider. Length: 2.0 - 2.2 mm."
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Preceded By: early tailbud stage Succeeded By: NF stage 23