Figure 1.

Phylogenetic position of the SSD Ostreococcus-like sequence as inferred from the 18S rRNA sequences in [30]. Outgroup sequence, Bathycoccus; OT95, Ostreococcus tauri (clade C); RCC356, RCC344 and MIC106, surface strains (clade A); RCC393 and RCC143, deep strains (clade B); RCC501, surface strain (clade D). Numbers on branches are support values (posterior probability).