|OBO ID: ZFA:0000106|
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|Term Name:||extension||Search Ontology:|
|Definition:||The posterior elongated region of the yolk cell that forms during the segmentation period. (1)|
|Appears at:||Segmentation:10-13 somites (14.0h-16.0h)|
|Evident until:||Larval:Day 4 (96.0h-120.0h)|