Related Experiment Video
Updated: Jun 13, 2026

Novel Sequence Discovery by Subtractive Genomics
Published on: January 25, 2019
Reconstructing euglenoid evolutionary relationships using three genes: nuclear SSU and LSU, and chloroplast SSU rDNA
Eric W Linton1, Anna Karnkowska-Ishikawa, Jong Im Kim
1Central Michigan University, Department of Biology, Mt. Pleasant, MI 48859, USA. eric.linton@cmich.edu
Abstract:
Using Maximum Likelihood and Bayesian analyses of three genes, nuclear SSU (nSSU) and LSU (nLSU) rDNA, and chloroplast SSU (cpSSU) rDNA, the relationships among 82 plastid-containing strains of euglenophytes were clarified. The resulting tree split into two major clades: clade one contained Euglena, Trachelomonas, Strombomonas, Colacium, Monomorphina, Cryptoglena and Euglenaria; clade two contained Lepocinclis, Phacus and Discoplastis. The majority of the members of Euglena were contained in clade A, but seven members were outside of this clade. Euglena limnophila grouped with, and was thus transferred to Phacus. Euglena proxima was a single taxon at the base of clade one and is unassociated with any subclade. Five members of Euglena grouped together within clade one and were transferred into the newly erected genus Euglenaria. The monophyly of the remaining genera was supported by Bayesian and Maximum Likelihood analyses. Combining datasets resolved the relationships among ten genera of photosynthetic euglenoids.
Related Concept Videos
Diversity of Protists I
Evolutionary Relationships through Genome Comparisons
Diversity of Protists III
Microbial Phylogeny
Eukaryotic Evolution
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Gene Evolution - Fast or Slow?
In contrast, regions which code...

