At 25oC, male eyes have about 5 facets fused into a vertical strip; B58l/+ female eyes have about 35. Higher temperature decreases facet number. Addition of 2.5% lactamide to medium increases facet number to almost 540 in heterozygous female. RK1A.
E.B. Lewis, 4th Dec. 1958.
Male sterile, presumably due to second-site mutation(s).