Stigonema sp., copyright Proyecto Agua.

Belongs within: Hormogoneae.

The Stigonematales are a group of blue-green algae in which the filamentous thalli exhibit cell reproduction by binary fission periodically or commonly in more than one plane, producing multiseriate and/or branched trichomes (Castenholz 2001).

    |--Chlorogloeopsis Mitra & Pandey 1966L02, C01
    |    `--C. fritschiiC01
         |--Langiella scourfieldi Croft & George 1959E93
         |--Kidstoniella fritschi Croft & George 1959E93
         |--Hapalosiphon Nägeli in Kützing 1849A90, C01
         |    `--H. welwitschiiL02
         |    |--S. ocellatumSG05
         |    `--S. sansibaricusSG05
         `--Stigonema Agardh 1824C01
              |--S. informeMS98
              |--S. minutumC01
              `--S. ocellatumC01
Stigonematales incertae sedis:
  Geitleria Friedmann 1955C01
    `--G. calcareaC01
  Loriella Borzi 1892C01
    `--L. osteophilaC01
  Mastigocoleus testarumC01
  Doliocatella Geitler 1935C01
  Mastigocladus Cohn 1862C01
    `--M. laminosus [=Hapalosiphon laminosus]C01
  Iyengariella Desikachary 1953C01
    `--I. endolithicaC01
  Nostochopsis Wood 1869C01

*Type species of generic name indicated


[A90] Archibald, P. A. 1990. Soil algae. In: Dindal, D. L. (ed.) Soil Biology Guide pp. 69–96. John Wiley & Sones: New York.

[C01] Castenholz, R. W. 2001. Phylum BX. Cyanobacteria: oxygenic photosynthetic bacteria. In: Boone, D. R., R. W. Castenholz & G. M. Garrity (eds) Bergey’s Manual of Systematic Bacteriology 2nd ed. vol. 1. The Archaea and the Deeply Branching and Phototrophic Bacteria pp. 473–599. Springer.

[E93] Edwards, D. 1993. Monera (bacteria, blue-green algae). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 3–7. Chapman & Hall: London.

[L02] Litvaitis, M. K. 2002. A molecular test of cyanobacterial phylogeny: inferences from constraint analyses. Hydrobiologia 468: 135–145.

[MS98] Margulis, L., & K. V. Schwartz. 1998. Five Kingdoms: An Illustrated Guide to the Phyla of Life on Earth 3rd ed. W. H. Freeman and Company: New York.

[SG05] Sau, A., & R. K. Gupta. 2005. Algal flora of Indian Botanic Garden, Howrah, West Bengal. Bulletin of the Botanical Survey of India 47: 63–86.

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