(A,A′) SEM eye image of RNAi control line (ninaE.GMR-Gal4/+), showing the regular array of ommatidia and bristles. (A′) shows magnified view of boxed area in (A). (B,B′) SEM image of the Hrp38 knockdown eye by RNAi (ninaE.GMR-Gal4/UAS-Hrp38RNAi), showing the disrupted pattern of ommatidia and bristles. (C,C′) Confocal image of the adult eye structure (C) and the third-instar eye imaginal disc (C′) of the hrp38 mutant expressing Hrp38:RFP transgene driven by longGMR:Gal4 line (UAS>Hrp38:RFP/Long-GMR:Gal4;hrp38d05172/Df). (D,D′) Confocal image of the adult eye structure (D) and the third-instar eye imaginal disc (D′) of the hrp38 mutant expressing Hrp38:RFP transgene driven by the ninaE.GMR:Gal4 line (UAS>Hrp38:RFP/ninE-GMR:Gal4;hrp38d05172/Df). In (C′,D′), the photoreceptor cells are labeled with anti-ELAV antibody (green). Scale bars: 100 μm (A, B, C, D); 10μm (A′, B′, C′, D′).