PHYLOGENY OF EUGLENOPHYCEAE BASED ON SMALL SUBUNIT rDNA SEQUENCES: TAXONOMIC IMPLICATIONS¹

Small subunit rDNA sequences of 42 taxa belonging to 10 genera were used to infer phylogenetic relationships among euglenoids. Members of the phototrophic genera Euglena , Phacus , Lepocinclis , Colacium , Trachelomonas , and Strombomonas plus the osmotrophs Astasia longa , Khawkinea quartana , and Hyalophacus ocellatus were included. Six major clades were found in most trees using multiple methods. The utility of Bayesian analyses in resolving...