Plant Systematics and Evolution

, Volume 241, Issue 3, pp 185–191

Phylogenetic relationships of Scenedesmus and Acutodesmus (Chlorophyta, Chlorophyceae) as inferred from 18S rDNA and ITS-2 sequence comparisons


DOI: 10.1007/s00606-003-0061-7

Cite this article as:
Hegewald, E. & Wolf, M. Plant Syst. Evol. (2003) 241: 185. doi:10.1007/s00606-003-0061-7


The complete 18S rDNA and ITS-2 sequences of two strains of Scenedesmus arcuatus were determined and subjected to phylogenetic analyses. Furthermore, ITS-2 sequences of Scenedesmus obtusus, of S. hindakii, and of Acutodesmus regularis were investigated. Phylogenetic analyses indicated that S. hindakii is most closely related to S. raciborskii and/or S. obtusus, embedded in the Scenedesmuscluster. The morphologically similar S. arcuatus and its variety platydiscus branched outside the Scenedesmus/Acutodesmus cluster (18S) or together with A. regularis and A. pectinatus (ITS-2). Therefore, the genera Acutodesmus and/or Scenedesmus are paraphyletic. S. arcuatus is not closely related to S. hindakii.


Euphorbiasucculentssubsect. Meleu-phorbiaphylogenyITS-regionatpB-rbcL IGS promoterSouth Africa.

Copyright information

© Springer-Verlag Wien 2003

Authors and Affiliations

  1. 1.Institute of Chemistry and Dynamics of the Geosphere IIIResearch Centre JülichJülichGermany
  2. 2.Department of Bioinformatics, BiocenterUniversity of WürzburgWürzburgGermany