Glaucocystis nostochinearum, from Takahashi et al. (2015). Scale bar = 20 μm.

Belongs within: Diaphoretickes.

The Glaucophyta are a group of freshwater unicellular algae with chloroplasts (cyanelles) retaining a wall structure similar to cyanobacteria.

Characters (from Adl et al. 2019): Unicellular or colonial algae; plastid (cyanelle) with conspicuous peptidoglycan wall between its two membranes; chlorophyll type-a only, with phycobiliproteins and other pigments; ciliated and non-ciliated species or life cycle stages; usually without cellulosic cell wall.

<==Glaucophyta [Glaucocystaceae, Glaucocystophyceae, Glaucocystophyta, Glaucoplantae]
    |--Cyanophoraceae [Cyanophorales]C-S18
    |    |--Cyanoptyche gloeocystisC-S18, OI05
    |    `--Cyanophora Korshikov 1924C-S18
    |         |--C. cuspidataC-S18
    |         `--C. paradoxaOI05
         |--Gloeochaete wittrockianaC-S18, OI05
         `--Glaucocystis Itzigsohn in Rabenhorst 1868OI05, MK03 [incl. SkujapeltaMK03; Skujapeltaceae]
              |--G. cingulataMK03
              |--G. duplexMK03
              |--G. indicaMK03
              |--G. nostochinearum Itzigsohn in Rabenhorst 1868 [incl. Skujapelta nuda]MK03
              |--G. oocystiformisMK03
              `--G. reniformis Prasad, Mehrotra & Misra 1984MK03

*Type species of generic name indicated


Adl, S. M., D. Bass, C. E. Lane, J. Lukeš, C. L. Schoch, A. Smirnov, S. Agatha, C. Berney, M. W. Brown, F. Burki, P. Cárdenas, I. Čepička, L. Chistyakova, J. del Campo, M. Dunthorn, B. Edvardsen, Y. Eglit, L. Guillou, V. Hampl, A. A. Heiss, M. Hoppenrath, T. Y. James, A. Karnkowska, S. Karpov, E. Kim, M. Kolisko, A. Kudryavtsev, D. J. G. Lahr, E. Lara, L. Le Gall, D. H. Lynn, D. G. Mann, R. Massana, E. A. D. Mitchell, C. Morrow, J. S. Park, J. W. Pawlowski, M. J. Powell, D. J. Richter, S. Rueckert, L. Shadwick, S. Shimano, F. W. Spiegel, G. Torruella, N. Youssef, V. Zlatogursky & Q. Zhang. 2019. Revisions to the classification, nomenclature, and diversity of eukaryotes. Journal of Eukaryotic Microbiology 66: 4–119.

[C-S18] Cavalier-Smith, T. 2018. Kingdom Chromista and its eight phyla: a new synthesis emphasising periplastid protein targeting, cytoskeletal and periplastid evolution, and ancient divergences. Protoplasma 255: 297–357.

[MK03] Mallick, P., & J. P. Keshri. 2003. On the occurrence of Glaucocystis Itzigsohn in eastern India. Bulletin of the Botanical Survey of India 45: 165–172.

[OI05] Okamoto, N., & I. Inouye. 2005. The katablepharids are a distant sister group of the Cryptophyta: a proposal for Katablepharidophyta divisio nova/Kathablepharida phylum novum based on SSU rDNA and beta-tubulin phylogeny. Protist 156: 163–179.

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