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Ontology Definition: TS15

Theiler Stage 15 - Formation of posterior neuropore; forelimb bud


The posterior neuropore form and the condensation of the forelimb bud becomes apparent near the 8th-12th somite pairs. A distinct condensation of the hind limb bud appears just at the end of the stage. The forebrain vesicle subdivides into telencephalic and diencephalic vesicles.

Absent: hindlimb bud, Rathke's pouch.


9.5 dpc (range 9-10.25)
21-29 somite pair

Witschi Stage 17-19 (rat - stage table)
Carnegie - Stage 12 (human - stage table)
Virtual Human Embryo - Stage 12

All scale bars in microns

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