List of eukaryotic species that belong to picoplankton, meaning one of their cell dimensions is smaller than 3 μm.
Autotrophic species
Chlorophyta
Chlorophyceae
Stichococcus cylindricus Butcher, 3 – 4.5 μm, brackish
Pedinophyceae
Marsupiomonas pelliculata Jones et al., 3 – 3 μm, brackish-marine
Resultor micron Moestrup, 1.5 – 2.5 μm, marine
Prasinophyceae
Bathycoccus prasinos Eikrem et Throndsen, 1.5 – 2.5 μm, marine
Crustomastix stigmatica Zingone, 3 – 5 μm, marine
Dolichomastix lepidota Manton, 2.5 – 2.5 μm, marine
Dolichomastix eurylepidea Manton, 3 μm, marine
Dolichomastix tenuilepis Throndsen et Zingone, 3 – 4.5 μm, marine
Mantoniella squamata Desikachary, 3 – 5 μm, marine
Micromonas pusilla Manton et Parke, 1 – 3 μm, marine
Ostreococcus tauri Courties et Chrétiennot-Dinet, 0.8 – 1.1 μm, marine
Picocystis salinarum Lewin, 2 – 3 μm, hypersaline
Prasinococcus capsulatus Miyashita et Chihara, 3 – 5.5 μm, marine
Prasinoderma coloniale Hasegawa et Chihara, 2.5 – 5.5 μm, marine
Pseudoscourfieldia marina Manton, 3 – 3.5 μm, marine
Pycnococcus provasolii Guillard, 1.5 – 4 μm, marine
Pyramimonas virginica Pennick, 2.7 – 3.5 μm, marine
Trebouxiophyceae
Chlorella nana Andreoli et al., 1.5 – 3 μm, marine
Picochlorum oklahomensis Henley et al., 2 – 2 μm, hypersaline
Picochlorum atomus Henley et al., 2 – 3 μm, brackish
Picochlorum eukaryotum Henley et al., 3 – 3 μm, marine
Picochlorum maculatus Henley et al., 3 – 3 μm, brackish
Cryptophyta
Cryptophyceae
Hillea marina Butcher, 1.5 – 2.5 μm, marine
Haptophyta
Prymnesiaceae
Chrysochromulina tenuisquama Estep et al., 2 – 5 μm, marine
Chrysochromulina minor Parke et Manton, 2.5 – 7.5 μm, marine
Chrysochromulina apheles Moestrup et Thomsen, 3 – 4 μm, marine
Dicrateria inornata Parke, 3 – 5.5 μm, marine
Ericiolus spiculiger Thomsen, 3 – 3.8 μm, marine
Imantonia rotunda Reynolds, 2 – 4 μm, marine
Phaeocystis cordata Zingone, 3 – 4 μm, marine
Phaeocystis pouchetii Lagerheim, 3 – 8 μm, marine
Trigonaspis minutissima H.A.Thomsen, 2 – 3.6 μm, marine
Heterokontophyta (Stramenopiles)