part of
part of
ectoderm
primordium
ectodermal placode
AEO:0000218
An ectodermal placode is a thickening of the ectoderm that is the primordium of many structures derived from the ectoderm[GO]
FMA:293966
UBERON:0005085
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.
consder adding placodal ectoderm as a distinct class? Also place placodal ectoderm as develops_from ectoderm; need to check taxon-appropriateness
epithelial placode
in GO, covers optic, otic, olfactory, mammary, hair, tooth, sebaceous.
uberon