Class Genus Species No. Strain No.
Ulvophyceae Ulothrix 
Prymnesiophyceae Umbilicosphaera 
Cyanophyceae Umezakia 
Chlorarachniophyceae Unidentified chlorarachniophyte 
Pelagophyceae Unidentified coccoid pelagophyte 
Prasinophyceae Unidentified coccoid prasinophyte 
Cyanophyceae Unidentified cyanobacterium 
Metamonada incertae sedis Unidentified metamonad 
Pedinophyceae Unidentified pedinophyte 
Pelagophyceae Unidentified pelagophyte 
Heterokontophyta incertae sedis Unidentified yellow heterokontophyte 
Chlorophyceae Urnella 
Chrysophyceae Uroglena 
Chlorophyceae Uronema 

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