part_of
part of
part of
preceded by
NF stage 35 and 36
NF stage 37 and 38
XAO:1000050
Nieuwkoop and Faber stage 37/38, corresponding to an embryo of age 2 days, 5 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Stomodeal invagination much deeper, opening round. Both gill rudiments nipple-shaped, a branch of the anterior one indicated. Posterior outline of proctodeum straight, forming very obtuse angle with ventral border of tail myotomes. Melanophores spreading over tail. Length: 5.6 - 6.2 mm.
xenopus_developmental_stage
late tailbud stage
NF stage