Molecular Evidence for the Wide Distribution of Two Lineages of Terrestrial Green Algae (Chlorophyta) over Tropics to Temperate Zone

Figure 3

(a) Schematic 18S-based phylogenetic tree of the Trebouxiophyceae showing the placement of sequences assigned to Xylochloris, (b) the clade including Xylochloris irregularis and its closest relatives from Europe shown as a section of the full 18S rDNA ML-phylogenetic tree of the Trebouxiophyceae (Figure S2), (c) world map with dots representing regions where Xylochloris sequences were detected, and (d) BioNJ-tree based on partial 18S sequences (hypervariable regions V8 and V9). Colors in Figures (c) and (d) indicate three geographical regions where Xylochloris occurs (orange—southeast Asia, green—South and Latin America, blue—Europe). Names in bold represent specimens analysed as both partial- and full-length 18S rDNA sequences.