part_of
part of
part of
ectoderm
primordium
embryonic structure
ectodermal placode
epithelial placode
consder adding placodal ectoderm as a distinct class? Also place placodal ectoderm as develops_from ectoderm; need to check taxon-appropriateness
AEO:0000218
An ectodermal placode is a thickening of the ectoderm that is the primordium of many structures derived from the ectoderm[GO].
With the exception of the adenohypophysis, homologues of the nonneurogenic placodes (e.g. placodes giving rise to the teeth, hair follicles and lens), appear to be lacking in invertebrate chordates.
UBERON:0005085
uberon
in GO, covers optic, otic, olfactory, mammary, hair, tooth, sebaceous - and also insect structures