Figure 1

Hypothesized gene rearrangements of gastropod mt genomes. Genes encoded by the minor strand are underlined. Genes are colored to facilitate following main inversion and transposition events between Cephalopoda, Vetigastropoda, and Caenogastropoda. The many gene rearrangements that potentially occurred at the origin of Patellogastropoda and Heterobranchia, or between both groups and Caenogastropoda, are not shown. Ce.: Cephalopoda; Ve.: Vetigastropoda; Ca.: Caenogastropoda; He.: Heterobranchia; Pa.: Patellogastropoda; Oc.: Octopoda; Pl.: Pleurotomarioidea; Ne.: Neogastropoda; Li.: Littorinimorpha; Pu.: Pulmonata; Op.: Opisthobranchia; Ac.: Acmaeoidea.