Figure 1.

The phylogenetic distribution of dorsal hair patterns for five members of the D. melanogaster species group. A phylogeny of these species is shown (Left, modified from ref. 36). Confocal micrographs are shown for abdominal segments 1 and 2 for each species. A cartoon of the pattern of hairs is shown beside each micrograph. In the cartoons, cells in the anterior and posterior compartment of the segment are shown as white and gray rectangles, respectively. The relative positions of the three types of cuticular projections, short denticles, fine hairs, and large denticles are illustrated (see text). Anterior is up. The dorsal hair patterns for the remaining members of the group (Drosophila erecta, Drosophila orena, and Drosophila teissieri) are similar to Drosophila yakuba (not shown).