Gonyostomum

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Gonyostomum
Scientific classification
(unranked):	SAR
Superphylum:	Heterokonta
Phylum:	Ochrophyta
Class:	Raphidophyceae
Order:	Raphidomonadales
Family:	Vacuolariaceae
Genus:	Gonyostomum Diesing 1866
Type species
Gonyostomum semen (Ehrenberg 1853) Diesing 1866
G. depressum (Lauterborn 1897) Lemmermann 1908 G. intermedium Skuja 1956 G. latum Ivanov 1900 G. ovatum Fott 1952 G. semen (Ehrenberg 1853) Diesing 1866 G. sinensis Jao 1978
Synonyms
Raphidomonas Stein 1878

Gonyostomum is a genus of freshwater algae in the class Raphidophyceae. They include the species Gonyostomum semen, which causes nuisance algal blooms.