Fig. 4

Evolution of the flagellar apparatus in the Chlorophyceae. The ancestral states of the absolute orientation of the flagellar apparatus were reconstructed using Mesquite 3.03 [64]. The most parsimonious scenario of character states is shown, with colored lines denoting the orientation patterns observed for biflagellate and quadriflagellate motile cells within the chlorophycean lineages. In the case of the Oedogoniales stephanokonts, the orientation pattern is ambiguous