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Summary Stage Literature (55) Attributions Wiki

Name: NF stage 44

XAO ID: 1000056

Definition: "Nieuwkoop and Faber stage 44, corresponding to an embryo of age 3 days, 20 hr at 22-24 Celsius and having the following external morphological criteria: Appearance of tentacle rudiments. Opercular folds protruding further. Coiling part of intestine showing S-shaped loop; torsion about 360 degrees. Blood-circulation in gills usually ceased (gills smaller). Length: 7.8 - 8.5 mm."

Preceded By: NF stage 43 Succeeded By: NF stage 45