part of part of develops from develops from capable of capable of detection of light stimulus involved in visual perception late embryo eye ectoderm-derived structure insect larval ocular segment insect embryonic/larval ocular segment sensillum insect Bolwig organ larval Bolwig's organ embryonic Bolwig's organ Bolwig's organ FBbt:00005805 embryonic visual system Visual organ of the larva. It consists of a dense cluster of 12 ciliated photoreceptor neurons. dorsocaudal pharyngeal sense organ UBERON:6005805 insect Bolwig organ primordium insect internal sensillum insect embryonic/larval head sensillum embryonic craniocervical region