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24Messbild40x203x28bSpirotaenia condensata Breb.jpg
Spirotaenia condensata
Scientific classification e
(unranked): Viridiplantae
Genus: Spirotaenia
Gontcharov and Melkonian, 2004

Spirotaenia is a genus of basal green algae that may be sister to the Chlorokybophyceae.[1] It was previously considered to be part of the Zygnemataceae. It is sexually conjugating, a mode of reproduction that was previously only known in the Zygnemataceae/Mesotaeniaceae, the sister groups to the land plants. This is surprising, as spirotaenia is much more basal. The conjugating process is substantially aberrant. [2][3] Spirotaenia may actually be more than one distinct lineage which may not be closely related.[4]


  1. ^ Gitzendanner, Matthew A.; Soltis, Pamela S.; Wong, Gane K.-S.; Ruhfel, Brad R.; Soltis, Douglas E. (2018). "Plastid phylogenomic analysis of green plants: A billion years of evolutionary history". American Journal of Botany. 105 (3): 291–301. doi:10.1002/ajb2.1048. ISSN 0002-9122. 
  2. ^ Brook, Alan J. (1981). The Biology of Desmids. University of California Press. ISBN 9780520042810. 
  3. ^ Gontcharov, Andrey A.; Melkonian, Michael (2004). "Unusual position of the genus Spirotaenia (Zygnematophyceae) among streptophytes revealed by SSU rDNA andrbcL sequence comparisons". Phycologia. 43 (1): 105–113. doi:10.2216/i0031-8884-43-1-105.1. ISSN 0031-8884. 
  4. ^ COESEL, PETER; VANHOOF, ANDRÉ; MEESTERS, KOOS (2017-12-01). "Zygospore morphology in the conjugating green alga Spirotaenia diplohelica (Streptophyta, Zygnematophyceae, Mesotaeniaceae)". Phytotaxa. 329 (3): 284. doi:10.11646/phytotaxa.329.3.10. ISSN 1179-3163.