Summary Stage Literature (219) Attributions Wiki

Name: NF stage 41 XAO ID: 1000053 Definition: "Nieuwkoop and Faber stage 41, corresponding to an embryo of age 3 days, 4 hr at 22-24 Celsius and having the following external morphological criteria: Gills broader and flatter, more laterally directed. Formation of a left-rostral and a right-caudal furrow in yolk mass; torsion of interjacent part about 45 degrees; formation of conical proctodeum, forming angle of about 60 degrees with tail myotomes. Formation of fin rostral to proctodeum; ventral outline of yolk mass and proctodeum a smooth concave line. Length: 6.7 - 7.5 mm."

Preceded By: NF stage 40

Succeeded By: NF stage 42