part_of
part of
part of
preceded by
gastrula stage
NF stage 11
NF stage 11.5
Nieuwkoop and Faber stage 11.5, corresponding to an embryo of age 12 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Large yolk plug stage. Blastopore groove closed ventrally; yolk plug not yet quite circular. At ventral side concentrated superficial pigment still visible. Diameter of yolk plug about a third of diameter of egg (plus or minus 40 degrees). Length: 1.4 - 1.5 mm.
XAO:1000032
xenopus_developmental_stage
NF stage