Spirotaenia

Genus of algae

Spirotaenia
Spirotaenia condensata
Scientific classification
(unranked):
Archaeplastida
Kingdom:
Viridiplantae
Genus:
Spirotaenia

Brébisson 1848
Type species
Spirotaenia condensata
Brébisson 1848
Synonyms
  • Entospira Kuntze 1898
  • Endospira Brébisson 1850

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]

Phylogeny

Archaeplastida

Rhodophyta (red algae)

Glaucophyta (opaque cyan algae)

Viridiplantae
Prasinodermophyta

Palmophyllophyceae (prasinophyte clade VI)

Prasinodermophyceae

Chlorophyta

Streptophytes
Plantae
groups
traditionally
included in
the "algae"

References

  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. PMID 29603143.
  2. ^ Hidden genetic diversity in the green alga Spirogyra (Zygnematophyceae, Streptophyta)
  3. ^ Brook, Alan J. (1981). The Biology of Desmids. University of California Press. ISBN 9780520042810.
  4. ^ 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.
  5. ^ 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.
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Classification of Archaeplastida or Plantae s.l.
Domain
Archaea
Bacteria
Eukaryota
(major groups
Excavata
Diaphoretickes
Hacrobia
Rhizaria
Alveolata
Stramenopiles
Plants
Amorphea
Amoebozoa
Opisthokonta
Animals
Fungi)
Archaeplastida
Picozoa
Rhodelphidia
Rhodophyta
(red algae)
Glaucophyta
incertae sedis
Viridiplantae
or Plantae s.s.
(green algae &
land plants)
Prasinodermophyta
 Chlorophyta
Prasinophytina
Chlorophytina
Streptophyta
Phragmoplastophyta
Anydrophyta
Embryophyta
(land plants)
  • (see below↓)
Embryophytes or Plantae sensu strictissimo
Bryophytes
Marchantiophyta
(liverworts)
Anthocerotophyta
(hornworts)
Bryophyta
(mosses)
 Polysporangiophytes
Protracheophytes*
Tracheophytes
(vascular plants)
Paratracheophytes*
Eutracheophytes
Lycophytes
Euphyllophytes
Moniliformopses
Lignophytes
Progymnosperms*
  • †Noeggerathiopsida
  • †Aneurophytopsida
  • †Archaeopteridopsida
  • †Protopityales
Spermatophytes
(seed plants)
Pteridosperms*
(seed ferns)
and other extinct
seed plant groups
Acrogymnospermae
(living gymnosperms)
Angiospermae
(flowering plants)
Portal:
  • icon Plants
Taxon identifiers
Spirotaenia


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