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XB-STAGE-53
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Name: NF stage 39
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XAO Id: XAO:1000051
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Definition: Nieuwkoop and Faber stage 39; age 2 days, 8 hr 30 min at 22-24 Celsius; corresponding to 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.
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[2.8.5]
