cuspidothrix cuspidothrix cuspidothrix is a genus of cyanobacteria belonging to the family nostocaceae. cuspidothrix scientific classification domain: bacteria phylum: cyanobacteria class: cyanophyceae order: nostocales family: nostocaceae genus: cuspidothrixp.rajaniemi, j.komárek, r.willame, p.hrouzek, k.kastovská, l.hoffmann & k.sivonen, 2005 the genus has almost cosmopolitan distribution. species: cuspidothrix elenkinii (i.a.kisselev) p.rajaniem, j.komárek, r.willame, p.hrouzek, k.kastovská, l.hoffmann & k.sivonen cuspidothrix issatschenkoi (usačev) p.rajan., komárek, willame, hrouzek, katovská, l.hoffm. & sivonen cuspidothrix tropicalis (horecká & komárek) rajan. et al.