Phylogenetic distribution of fifteen microinversion events. For 15 microinversions distinguishing the genomes of D. melanogaster and D. pseudoobscura, we examined orthologous regions from 10 other Drosophila species to determine whether they harbor the standard (St; D. melanogaster-like) or inverted (In; D. pseudoobscura-like) arrangement. Some species could not be reliably shown to have either arrangement (shown with a dash). A consensus phylogeny of the 12 species is provided. The microinversion events are grouped according to phylogenetic position, and mapped onto the consensus phylogeny.