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Scytonema (Cyanophyceae)

Scytonema sp. with twin false branches
Photograph modified from public.asu.deu/ferran/images/M8

Scytonema sp. with cells dividing and elongating inside rigid sheath, forming a bulge that will eventually form twin false branches. Note also the yellow heterocysts near left side of image.
Photograph by Ralf Wagner posted online

Scytonema sp. with twin false branches after two cells separated from each other and ruptured through thick sheath.   Photograph by J. Kinross posted online

Scytonema sp. with pseudobranches formed between two heterocysts.
Photograph by Ricardo Rico on Flickr, posted online

Scytonema sp. from Japan
Photograph by 'Nekko No Shippo' posted online

Scytonema bewsii Fritsch
Modified from sketch by Thérézien, Y. and A. Couté (1977) from the collection of Manfred Bölter, University of Kiel, DE

Thérézien, Y. and A. Couté 1977. Algues d’eau douce des Îles Kerguelen et Crozet. Comite Nation Franc Rech Antarct 43: 1-91

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