Fig 2. Maximum likelihood phylogeny of 26 strains of Plagiogrammacean diatoms (with bootstrap values at nodes) was inferred from four markers (LSU, SSU rDNA, rbcL and psbC).

Taxa (Neofragilaria stilus, Orizaformis holarctica and Psammoneis obaidii) in bold are newly described species. Support values lower than 50% were omitted. The outgroup Asterionella formosa was removed from the tree.