Phiala simplex is a moth in the family Eupterotidae. It was described by Per Olof Christopher Aurivillius in 1904. It is found in the Democratic Republic of the Congo (Katanga), Malawi and Zimbabwe.[1]
The wingspan is 46 mm. The wings are snow white, beyond the middle about 6 mm from the margin with a fine transverse line composed of black scales. This line is nearly erect in the forewings, gently arched and somewhat waved in the hindwings.[2]