Figure 4 in Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)

Figure 4. Evolution of the Acochlidia. Strict consensus tree (see Fig. 3, but with outgroups condensed), showing some selected apomorphies of the major groups (indicated by vertical blotches), e.g. the dagger-like radula teeth of ganitids. Homoplasies, such as the independent evolution of secondary spicule shells, are marked in italics. Limnic species (in boxes) evolved twice, independently; note the differences between the single, small-sized Tantulum elegans from the Caribbean and the array of large, benthic Indo-Pacific Acochlidiidae species that obviously had greater evolutionary success.