Domain Bacteria Woese et al. 1990
   Phylum Cyanobacteria (ex Stanier 1974) Cavalier-Smith 2002 - cyanobacteria
     Class "Cyanobacteria" Cavalier-Smith, 2002
       Subsection V
         Family I
           Form genus Fischerella (E. Bornet & C. Flahault) M. Gomont (1895)