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Rhodella
Genus, Alga, Marine
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Rhodochorton
Genus, Alga, Marine, terrestrial
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Rhodomela
Genus, Alga, Marine
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Rhodophyllis
Genus, Alga, Marine
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Rhodophysema
Genus, Alga, Marine
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Rhodothamniella
Genus, Alga, Marine
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Rhodymenia
Genus, Alga, Marine
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Rosenvingiella
Genus, Alga, Marine, terrestrial
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Rubrointrusa
Genus, Alga, Marine, terrestrial
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Ruthnielsenia
Genus, Alga, Marine
-
Rytiphlaea
Genus, Alga, Marine
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Sahlingia
Genus, Alga, Marine
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Sarcodiotheca
Genus, Alga, Marine
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Scagelia
Genus, Alga, Marine
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Scagelothamnion
Genus, Alga, Marine
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Scenedesmus
Genus, Alga, Marine, terrestrial
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Schimmelmannia
Genus, Alga, Marine
-
Schizymenia
Genus, Alga, Marine
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Schmitzia
Genus, Alga, Marine
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Schmitziella
Genus, Alga, Marine