Lindsley & Grell, 1972, pp. 69-70
discoverer: Bridges, 18k30.
references: Bridges and Morgan, 1923, Carnegie Inst. Wash. Publ. No. 327: 197-201 (fig.). Morgan, Bridges, and Sturtevant, 1925, Bibliog. Genet. 2: 75 (fig.).
phenotype: Veins thickened and broadened into deltas at junction with margin. Eyes somewhat small and slightly roughened. In extreme cases, ocelli run together into a crescent that encloses the ocellar bristles. Hairs on thorax straggly and more numerous. Body color dark. Wings small, dark, and somewhat spread. Effects of Dl neutralized by H. Dl and several of its alleles shown to interact synergistically with certain Minutes, producing extreme phenotype and drastically lowered viability (Schultz, 1929, Genetics 14: 366-419). Homozygous lethal. RK2.
cytology: Located in region 91D1-92A2, inclusively, based on its inclusion within the transposed section of Tp(3)bxd110 = Tp(3)89E2-3;91C7-D1;92A2-3 (E. B. Lewis) and in Df(3R)DlH = Df(3R)91C6-D1;92A2-3 (Slizynski). Heterozygous deficiency for 91D1-92A2 produces the Dl phenotype since Tp(3)bxd110/+ is Dl+, whereas Df(3R)bxd110/+ is Dl.
color figure: P. A. Otto (original)
b & w figure: Bridges and Morgan, 1923, Carnegie Inst. Wash. Publ. No. 327: 197 (original drawn by Edith M. Wallace)