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Ontology Definition: TS23

Theiler Stage 23 - Toes separate


The toes separate and are clearly divergent, not becoming parallel until later. Hair follicles are present in the cephalic region but not at the periphery of the vibrissae. The pinna covers more than half of the external auditory meatus and the eyelids are still open.

Absent: nail primordia, fingers 2-5 parallel.


15 dpc
>60 somite pairs

Witschi Stage 32 (rat - stage table)
Human foetal period. (human - stage table)

All scale bars in microns

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