Spirotaenia is a genus of basal unicellular green algae that may be sister to the Chlorokybophyceae.[1][2] 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.[further explanation needed][3][4]Spirotaenia may actually be more than one distinct lineage which may not be closely related.[5]
^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. PMID 29603143.
^Hidden genetic diversity in the green alga Spirogyra (Zygnematophyceae, Streptophyta)
^Brook, Alan J. (1981). The Biology of Desmids. University of California Press. ISBN 9780520042810.
^Gontcharov, Andrey A.; Melkonian, Michael (2004). "Unusual position of the genus Spirotaenia (Zygnematophyceae) among streptophytes revealed by SSU rDNA and rbcL sequence comparisons". Phycologia. 43 (1): 105–113. CiteSeerX 10.1.1.539.2139. doi:10.2216/i0031-8884-43-1-105.1. ISSN 0031-8884. S2CID 51945556.
^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.
Spirotaenia is a genus of basal unicellular green algae that may be sister to the Chlorokybophyceae. It was previously considered to be part of the Zygnemataceae...
The basal character of the Mesostigmatophyceae, Chlorokybophyceae and spirotaenia are only more conventionally basal Streptophytes. The algae of this paraphyletic...
conjugating algae are the Mesotaeniaceae, sister of the Zygnematales, and Spirotaenia, a basal green algae. Additionally, the Desmidiales appear to have emerged...
mainly based on molecular data. The Mesostigmatophyceae (including Spirotaenia, and Chlorokybophyceae) are at the base of charophytes (streptophytes)...
parasites, especially chytrids. Most genera (all except Mesotanium and Spirotaenia) previously assigned to Mesotaeniaceae as well as the Desmidiales actually...
Zygnemataceae. The desmids are a deep branching group of Zygnemataceae. Spirotaenia was found to be a basal green alga. The Mesotaeniaceae includes the following...
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