Name: NF stage 42
XAO ID: 1000054
Definition: "Nieuwkoop and Faber stage 42, corresponding to an embryo of age 3 days, 8 hr at 22-24 Celsius and having the following external morphological criteria: Beginning of formation of opercular folds. Torsion of intestine about 90 degrees; proctodeum connected with yolk mass by short horizontal intestinal tube. Length: 7.0 - 7.7 mm."
|Preceded By: NF stage 41||Succeeded By: NF stage 43|