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Phylogenetic analyses of various euglenoid taxa (euglenozoa) based on 18s rdna sequence data
Article first published online: 25 DEC 2001
Journal of Phycology
Volume 36, Issue 1, pages 220–226, February 2000
How to Cite
Preisfeld, A., Berger, S., Busse, I., Liller, S. and Ruppel, H. G. (2000), Phylogenetic analyses of various euglenoid taxa (euglenozoa) based on 18s rdna sequence data. Journal of Phycology, 36: 220–226. doi: 10.1046/j.1529-8817.2000.99091.x
- Issue published online: 25 DEC 2001
- Article first published online: 25 DEC 2001
- 1 Received 8 May 1999. Accepted 15 October 1999.
- molecular phylogeny;
- 18S rRNA
18S rRNA genes (SSU rDNA) of five newly sequenced species were used as molecular markers to infer phylogenetic relationships within the euglenoids. Two members of the order Euglenales (Lepocinclis ovata Playfair, Phacus similis Christen), two of the order Eutreptiales (Distigma proteus Ehrenberg,, D. curvata Pringsheim) and Gyropaigne lefévrei Bourelly et Georges of the order Rhabdomonadales were used in parsimony, maximum likelihood, and distance analyses. All trees derived from SSU rRNA data strongly supported the monophyletic origin of the Euglenozoa, with kinetoplastids as sister clade to the euglenoids and Petalomonas cantuscygni Cann et Pennick diverging at the base of the monophyletic euglenoid lineage. The data also supported the theory that phagotrophic euglenoids arose prior to osmotrophs and phototrophs. A lineage of Peranema trichophorum Ehrenberg and all sequenced Euglenales formed a sister clade to the osmotrophs. This suggests that the evolution of phototrophy within the euglenoids radiated from a single event.