insect visual primordium formation
Establishment of the optic lobe placode. In Drosophila, for example, the placode appears in the dorsolateral region of the head in late stage 11 embryos and is the precursor to the larval visual system.
GO:0060788
ectodermal placode formation
is_a
GO:0001748
insect visual primordium development
part_of
optic lobe and Bolwig's organ precursor formation
exact
optic lobe placode formation
exact