I have not yet performed the translation of FMA3 from owlfull to owldl. However, I noticed that FMA:83617 "Motor neuron" is missing.
It is obo policy to never delete an ID. Once minted, an ID must be maintained forever, with some kind of obsoletion metadata
there is no record of the ID in the fma3 owlfull file. When I search in FMA explorer, I find the term and ID, but it's not associated with the hierarchy. This hints that the FMA database is retaining the ID, which is good. Although it would be better if the FMA explorer gave some additional information.
In any case, the ID is not being passed on the fma owlfull file. This should be resolved before we roll out an fma3 owlfull/owldl