Figure 1.—

Phylogenetic relationships between the species analyzed in this study. Chromosomal inversions fixed in each branch of the tree are indicated. Inversions fixed in the lineage from Primitive I to D. repleta are represented with the minus sign to indicate that they must be subtracted from the formula of Primitive I to get the formula for D. repleta. (A) Current phylogeny based on comparisons of polytene chromosome-banding patterns (Wasserman 1992; Ruiz and Wasserman 1993). (B) Phylogeny inferred from the results of in situ hybridizations of DNA probes to the polytene chromosomes (Ranz et al. 2003; this work). Inversion changes in the phylogenetic tree are shown in boldface type.