Phylogenetic Tree from Analysis of 18S rDNA data (Buchheim [unpublished observations]):

MP analysis: Cladogram from maximum parsimony analysis of 18S rDNA sequence data using PAUP* 4.0b8 (Swofford 2001). The tree was rooted using data from trebouxiophyte taxa. No differential weighting scheme was used. Bootstrap values ( greater than or equal to 50%) from 1000 replicates using NNI are listed at the appropriate internode. Branch lengths are drawn proportionally to the inferred change along the branch. Major lineages are identified by the name of one or more constituent taxa.