part of
part_of
part of
preceded by
NF stage 37 and 38
NF stage 39
Nieuwkoop and Faber stage 39, corresponding to an embryo of age 2 days, 8 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Melanophores appearing around nasal pits. Opening of stomodeal invagination transversely elongated. Melanophores on back arranged in a superficial and a deeper layer. Outlines of proctodeum and tail myotomes forming angle of about 135 degrees. Melanophores appearing along ventral edge of tail musculature. Length: 5.9 - 6.5 mm.
XAO:1000051
xenopus_developmental_stage
late tailbud stage
NF stage