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.

in GO, covers optic, otic, olfactory, mammary, hair, tooth, sebaceous - and also insect structures

consder adding placodal ectoderm as a distinct class? Also place placodal ectoderm as develops_from ectoderm; need to check taxon-appropriateness

epithelial placode

uberon

UBERON:0005085

• ectodermal placode development

• ectodermal placode formation

• placodal ectoderm

• ectodermal placode morphogenesis