Fig. 10. Delta is epistatic to hephaestus. (A) An example of a wing with two heph⁰³⁴²⁹ clones, one dorsal (red) and one ventral (blue), causing autonomous loss of the dorsal aspect of vein L4 and the region of the ventral aspect of vein L4 included in the ventral clone. (B) An example of two overlapping heph⁰³⁴²⁹ clones, one dorsal (red) and one ventral (blue), that disrupt the posterior crossvein. Typical examples of Dl^rev10 mutant clones (C,D) and Dl^rev10 heph⁰³⁴²⁹ double mutant clones (E,F). Like Dl clones, Dl heph clones cause an autonomous thick vein phenotype and are associated with non-autonomous vein differentiation in neighbouring tissue.

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