Stigonematales is the order of cyanobacteria that includes filamentous strains that produce hormogonia and exhibit true branching. Under the more recent classification system devised by Rippka et al., these strains are listed under section V .
Rippka, R. (1979). "Generic assignments, strain histories and
properties of pure cultures of cyanobacteria". Journal of General Microbiology. 111: 1–61. Unknown parameter
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