Genus
Phormidium
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Phormidium ambiguum GomontCubaProv. Oriente, river Rio Bayamo, littoral
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Phormidium cf. iriguum (Kuetzing ex Gomont) Anagnostidis et KomárekSwedenNorther Lapland, Abisko in vicinity of glacial moraine- Karsavagge, black brown mats in small stream close to glacial front
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Phormidium cf. irriguum (Kuetzing ex Gomont) Anagnostidis et KomárekSlovakiaBratislava, sand pit lake Strkovec, littoral
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Phormidium irriguum var. minor (Kützing ex Gomont) Anagnostidis & KomárekItalyMontegrotto Terme (Padova); cyanobacterium forming mats on thermal muds
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Phormidium cf. nigrum (Vaucher ex Gomont) Anagnostidis et KomárekCzech RepublicSumperk, tropical aquarium in greenhouse, periphyton on Myriophyllum
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Phormidium setchellianum GomontSlovakiaMts. Male Karpaty, Lozorno near Bratislava, soil, forest
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SlovakiaPiestany, Kupelny ostrov, basin for aging of thermal mud in spa
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NorwaySvalbard, Hornsun (77°00´15°20´E), small pool in moraine of Werenskioldbreen, black biofilms on rocks
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BrazilBrasilia, Sao Paulo, from greenhouse in botanical garden, 11/2004
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Phormidium cf. uncinatum (C. Agardh) Gomont ex GomontSwedenNorther Lapland, Abisko (69°21´N, 18°49´E), in vicinity of glacial moraine-Karsavagge, brown mats on wetted rock close to glacial front (2006)
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Phormidium autumnale Gomont 1892AntarcticaQueen Maud Land, Yukidori Valley, dirty snow field
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Phormidium autumnale Gomont 1892AntarcticQueen Maud Land, Yukidori Valley, The growth on the rock in the stream