Microsporidia Phylogenetic tree of Eukarya based on i8s ribosomaIrNa Flagellates sequence comparisons. monad Euglenoids Trypanosomes Slime molds Ciliates mals Dino flagellates Green algae Plants Red algae Fun Oomycetes Cells of microsporidia and Diatoms diplomonads are phylogenetically Brown algae most ancient of known Eukarya and contain a nucleus but lack mitochondriaPhylogenetic tree of Eukarya based on 18S ribosomal RNA sequence comparisons. Cells of microsporidia and diplomonads are phylogenetically most ancient of known Eukarya and contain a nucleus but lack mitochondria