bone element dermal bone other AOs are not yet in sync with this classification uberon VSAO:0000130 XAO:0004015 Wikipedia:Dermal_bone ZFA:0001590 AAO:0010769 Intramembranous bone that forms superficially in the organism.[TAO] dermal bones Skeletal element that forms superficially in the organism, usually in association with the ectoderm[VSAO]. UBERON:0008907 TAO:0001590