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(a) Water moss (Fontinalis antipyretica) floating on the surface of Lake Tegel (2 June 2017); (b–d) Tychonema sp. filaments within water moss clumps (b: 2 June 2017; c-d: 6 June 2017; b: ×100; c: ×400, d: ×1000); (e) Tychonema sp. filament observed in the stomach contents of a dead dog (×200).
