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  Eubacteria
    Negibacteria
      Cyanobacteria
            Cyanophyceae
              Nostocophycideae
                    Nostocales
                            Microchaetaceae
                                     Borzinema
                                             Borzinema rupicola
                                                   [Diplonema rupicola]
                                     Camptylonemopsis
                                             Camptylonemopsis boldii
                                             Camptylonemopsis danilovii
                                                   [Campylonema danilovii]
                                             Camptylonemopsis dingushanensis
                                             Camptylonemopsis epibryos
                                             Camptylonemopsis godwardii
                                             Camptylonemopsis iyengari
                                             Camptylonemopsis lahorensis
                                             Camptylonemopsis majus
                                             Camptylonemopsis minor
                                             Camptylonemopsis paperai
                                             Camptylonemopsis pulneyensis
                                             Camptylonemopsis semiaquatica
                                             Camptylonemopsis umida
                                                   [Campylonema umidum]
                                     Coleospermum
                                     Diplonema
                                             Diplonema confervoideum
                                             Diplonema percursum
                                     Fremyella
                                             Fremyella longifila
                                             Fremyella tenera
                                     Hassallia
                                             Hassallia allmanii
                                                   [Urococcus allmanii]
                                             Hassallia andreassenii
                                             Hassallia antarctica
                                             Hassallia byssoidea
                                                   Hassallia byssoidea f. lignicola
                                                   Hassallia byssoidea f. saxicola
                                               Hassallia byssoidea var. polyclados
                                             Hassallia californica
                                             Hassallia ceylonica
                                             Hassallia compacta
                                             Hassallia cryptophila
                                             Hassallia heterogena
                                             Hassallia heterogenea
                                             Hassallia hookeriana
                                             Hassallia insignis
                                             Hassallia limbata
                                                   [Oscillatoria limbata]
                                             Hassallia littoralis
                                             Hassallia manginii
                                             Hassallia murorum
                                             Hassallia ocellata
                                             Hassallia pseudoramosissima
                                             Hassallia rechingeri
                                                   Hassallia rechingeri f. saxicola
                                             Hassallia turfosa
                                             Hassallia usambarensis
                                     Leptobasis
                                             Leptobasis goesingense
                                             Leptobasis nipponica
                                             Leptobasis spirulina
                                               Leptobasis spirulina var. goesingense
                                             Leptobasis striatula
                                                   Leptobasis striatula f. laevis
                              Microchaetoideae
                                     Coleodesmium
                                           [Coleodesmiopsis]
                                             Coleodesmium floccosum
                                             Coleodesmium foreaui
                                             Coleodesmium kerguelense
                                             Coleodesmium lievreae
                                                   [Desmonema lievreae]
                                             Coleodesmium sagarmathae
                                             Coleodesmium scottianum
                                             Coleodesmium swazilandicum
                                             Coleodesmium wrangelii
                                                   [Coleodesmiopsis fremyi]
                                     Dactylothamnos
                                     Fortiea
                                             Fortiea africana
                                             Fortiea bossei
                                                   [Fremyella bossei]
                                               Fortiea bossei var. indica
                                             Fortiea caucasica
                                                   [Leptobasis caucasica]
                                             Fortiea crassa
                                                   [Fortiea tenuissima]
                                                   [Leptobasis crassa]
                                                   [Leptobasis tenuissima]
                                                   [Microchaete crassa]
                                                   [Microchaete tenuissima]
                                             Fortiea incerta
                                             Fortiea monilispora
                                             Fortiea rugulosa
                                             Fortiea salinicola
                                             Fortiea spirulina
                                                   [Microchaete spirulina]
                                             Fortiea striatula
                                                   [Fremyella striatula]
                                                   [Microchaete striatula]
                                             Fortiea subaiana
                                     Godleya
                                             Godleya alpina
                                     Microchaete
                                             Microchaete aequalis
                                                   [Fremyella aequalis]
                                             Microchaete aeruginea
                                             Microchaete articulata
                                             Microchaete brunescens
                                             Microchaete bulbosa
                                             Microchaete calothrichoides
                                             Microchaete capensis
                                             Microchaete catenata
                                             Microchaete changsusanensis
                                             Microchaete cladophorae
                                             Microchaete diplosiphon
                                                   [Fremyella diplosiphon]
                                               Microchaete diplosiphon var. cambrica
                                             Microchaete elongata
                                                   [Fremyella elongata]
                                             Microchaete epiphytica
                                             Microchaete ghazipurensis
                                             Microchaete goeppertiana
                                                   [Coleospermum goeppertianum]
                                             Microchaete grisea
                                                   [Fremyella grisea]
                                               Microchaete grisea var. brevis
                                               Microchaete grisea var. major
                                             Microchaete investiens
                                             Microchaete loktakensis
                                             Microchaete naushonensis
                                             Microchaete purpurea
                                             Microchaete robinsonii
                                             Microchaete robusta
                                             Microchaete schweickerdtii
                                             Microchaete setcasasii
                                             Microchaete sphagnicola
                                             Microchaete spiralis
                                             Microchaete striata
                                             Microchaete tapahiensis
                                             Microchaete tenera
                                               Microchaete tenera var. major
                                               Microchaete tenera var. tenuis
                                             Microchaete terrestris
                                             Microchaete transvaalensis
                                             Microchaete tropica
                                             Microchaete uberrima
                                             Microchaete violacea
                                             Microchaete vitiensis
                                                   [Fremyella vitiensis]
                                     Ophiothrix
                                             Ophiothrix epibryos
                                             Ophiothrix epidendron
                                             Ophiothrix hansgirgii
                                             Ophiothrix sphaerocephalus
                                     Spirirestis
                                             Spirirestis rafaelensis
                                     Tolypothrix
                                             Tolypothrix africana
                                             Tolypothrix alata
                                             Tolypothrix amoena
                                             Tolypothrix arboricola
                                                   Tolypothrix arboricola f. aquatica
                                             Tolypothrix arenophila
                                             Tolypothrix binata
                                             Tolypothrix bouteillei
                                                   [Hassallia bouteillei]
                                             Tolypothrix brevicellularis
                                             Tolypothrix brevis
                                                   [Hassallia brevis]
                                             Tolypothrix byssoidea
                                                   [Scytonema byssoideum]
                                               Tolypothrix byssoidea var. polycladus
                                             Tolypothrix calcarata
                                                   Tolypothrix calcarata f. minor
                                             Tolypothrix campylonemoides
                                             Tolypothrix cavanillesiana
                                             Tolypothrix cavernicola
                                             Tolypothrix ceylonica
                                             Tolypothrix chathamensis
                                             Tolypothrix chungii
                                             Tolypothrix conglutinata
                                               Tolypothrix conglutinata var. colorata
                                             Tolypothrix consociata
                                             Tolypothrix crassa
                                             Tolypothrix cucullata
                                             Tolypothrix curta
                                             Tolypothrix delicatula
                                             Tolypothrix discoidea
                                                   [Hassallia discoidea]
                                             Tolypothrix distorta
                                                   [Tolypothrix tenella]
                                                   Tolypothrix distorta f. penicillata
                                               Tolypothrix distorta var. brevis
                                               Tolypothrix distorta var. samoensis
                                               Tolypothrix distorta var. symplocoides
                                             Tolypothrix elenkinii
                                               Tolypothrix elenkinii var. saccoideo-fruticulosa
                                             Tolypothrix epilitica
                                                   [Tolypothrix setchellii var. epilithica]
                                             Tolypothrix fasciculata
                                             Tolypothrix flaccida
                                             Tolypothrix foreaui
                                             Tolypothrix fragilis
                                                   [Hassallia fragilis]
                                             Tolypothrix fragilissima
                                             Tolypothrix fusca
                                             Tolypothrix glacialis
                                             Tolypothrix granulata
                                                   [Hassallia granulata]
                                             Tolypothrix hatienensis
                                             Tolypothrix haumanii
                                             Tolypothrix helicophila
                                             Tolypothrix hollerbachii
                                             Tolypothrix irregularis
                                             Tolypothrix lanata
                                               Tolypothrix lanata var. hawaiiensis
                                             Tolypothrix letestui
                                             Tolypothrix lignicola
                                             Tolypothrix limbata
                                               Tolypothrix limbata var. cylindrica
                                             Tolypothrix lophopodellophila
                                             Tolypothrix lyngbyacea
                                             Tolypothrix magna
                                             Tolypothrix manginii
                                                   [Hassallia mangini]
                                             Tolypothrix mongolica
                                             Tolypothrix muscicola
                                               Tolypothrix muscicola var. hawaiiensis
                                             Tolypothrix nodosa
                                             Tolypothrix papyracea
                                             Tolypothrix penicillata
                                                   [Scytonema penicillatum]
                                                   [Tolypothrix distorta var. penicillata]
                                             Tolypothrix phyllophila
                                             Tolypothrix polymorpha
                                             Tolypothrix pseudorexia
                                             Tolypothrix pulvinata
                                                   [Hassallia pulvinata]
                                             Tolypothrix ravenelii
                                             Tolypothrix rechingeri
                                                   Tolypothrix rechingeri f. saxicola
                                             Tolypothrix rivularis
                                             Tolypothrix robusta
                                             Tolypothrix rugulosa
                                                   [Hassallia rugulosa]
                                             Tolypothrix rupestris
                                             Tolypothrix saviczii
                                             Tolypothrix scytonematoides
                                                   [Hassallia scytonematoides]
                                             Tolypothrix setchellii
                                             Tolypothrix subsalsa
                                             Tolypothrix tenuis
                                                   [Tolypothrix inflata]
                                                   Tolypothrix tenuis f. lanata
                                                   Tolypothrix tenuis f. terrestris
                                             Tolypothrix teodorescui
                                             Tolypothrix tibestiensis
                                             Tolypothrix tjipanasensis
                                             Tolypothrix wartmanniana
                                             Tolypothrix werneckei
                                             Tolypothrix willei
                                             Tolypothrix woodlarkiana
                                     Rexia
                                             Rexia erecta
                                     Seguenzaea
                                             Seguenzaea anthonyi
                                             Seguenzaea minor
                                                   Seguenzaea minor f. attenuata
                                             Seguenzaea sicula
                                     Streptostemon
                                             Streptostemon capitatus
                                             Streptostemon lutescens
                                     Toxopsis
                                             Toxopsis calypsus