NF stage 26

^ http://purl.obolibrary.org/obo/XAO_1000042

Nieuwkoop and Faber stage 26, corresponding to an embryo of age 1 day, 5 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Otic vesicle protruding. Pronephros distinctly visible. Myotomes showing through for the first time. Fin somewhat broadened at dorso-caudal end of body. Beginning of spontaneous movements. Length: 3.0 - 3.3 mm. [ https://www.worldcat.org/search?q=bn%3A0815318960 ]