has part has part has_part characteristic of has modifier abnormal subarcuate fossa morphology absent subarcuate fossa 2018-10-09T10:31:54Z absent floccular fossa missing the irregular depression normally found on the posterior inner surface of the petrous portion of the temporal bone just below its crest and above and lateral to the internal acoustic meatus MPheno.ontology MP:0030842 abnormal absent subarcuate fossa