Olisthodiscus
| Olisthodiscus | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota | 
| Clade: | Diaphoretickes | 
| Clade: | Sar | 
| Clade: | Stramenopiles | 
| Phylum: | Ochrophyta | 
| Class: | Olisthodiscophyceae Barcytė, Eikrem & M. Eliáš, 2021 | 
| Order: | Olisthodiscales Cavalier-Smith, 2013 emend. Barcytė, Eikrem & M. Eliáš, 2021 | 
| Family: | Olisthodiscaceae Cavalier-Smith, 2013 emend. Barcytė, Eikrem & M. Eliáš, 2021 | 
| Genus: | Olisthodiscus Carter 1937 | 
| Type species | |
| Olisthodiscus luteus Carter 1937 | |
| Species | |
| 
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Olisthodiscus is a genus of heterokont algae, present in marine or brackish waters. It is the only genus in the family Olisthodiscaceae, the order Olisthodiscales, and the class Olisthodiscophyceae. After a long history of controversial classifications, in 2021 it was recognized as a phylogenetically distinct lineage from the rest of ochrophyte classes.