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| Gonyostomum | |
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| Scientific classification | |
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| Genus: | Gonyostomum Diesing 1866 |
| Type species | |
| Gonyostomum semen (Ehrenberg 1853) Diesing 1866 | |
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| Synonyms | |
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Gonyostomum is a genus of freshwater algae in the class Raphidophyceae. They include the species Gonyostomum semen , which causes nuisance algal blooms.