Between brackets is the number of accepted marine extant species

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Shows the number of accepted marine extant species within the taxon
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- Biota (1 799)
- Kingdom Chromista (437)
- Kingdom Plantae (1 362)
- Subkingdom Biliphyta (1 064)
- Subkingdom Viridiplantae (298)
- Infrakingdom Streptophyta (7)
- Phylum (Division) Chlorophyta (290)
- Subphylum (Subdivision) Chlorophytina (290)
- Class Chlorodendrophyceae
- Class Chlorophyceae (11)
- Class Pedinophyceae
- Class Trebouxiophyceae (11)
- Class Ulvophyceae (268)
- Order Bryopsidales (66)
- Order Chlorocystidales
- Order Cladophorales (80)
- Family Anadyomenaceae Kützing, 1843 (6)
- Family Boodleaceae Børgesen, 1925 (5)
- Family Cladophoraceae Wille, 1884 (57)
- Genus Bryobesia Weber-van Bosse, 1911 (1)
- Genus Chaetomorpha Kützing, 1845 (14)
- Genus Cladophora Kützing, 1843 (30)
- Genus Conferva Linnaeus, 1753
- Genus Lychaete J.Agardh, 1846 (7)
- Species Lychaete battersii (C.Hoek) M.J.Wynne, 2017
- Species Lychaete echinus (Biasoletto) M.J.Wynne, 2017
- Species Lychaete feredayi (Harvey) M.J.Wynne, 2017
- Species Lychaete herpestica (Montagne) M.J.Wynne, 2017
- Species Lychaete pellucida (Hudson) M.J.Wynne, 2017
- Species Lychaete pygmaea (Reinke) M.J.Wynne, 2017
- Species Lychaete rhodolithicola (Leliaert) M.J.Wynne, 2017
- Genus Pseudorhizoclonium Boedeker, 2016 (1)
- Genus Rhizoclonium Kützing, 1843 (4)
- Family Okellyaceae Leliaert & Rueness in Leliaert, F., Rueness, J, Boedeker, C., Maggs, C.A., Cocquyt, E., Verbruggen, H. & De Clerck, O., 2009 (1)
- Family Pithophoraceae Wittrock, 1877 (2)
- Family Siphonocladaceae Schmitz, 1879 (4)
- Family Valoniaceae Kützing, 1849 (5)
- Order Dasycladales (8)
- Order Oltmannsiellopsidales (1)
- Order Sykidiales
- Order Ulotrichales (28)
- Order Ulvales (84)
- Order Ulvophyceae incertae sedis (1)
- Subphylum (Subdivision) Prasinophytina
- Class Chlorophyta incertae sedis
- Class Prasinophyceae
- Phylum (Division) Prasinodermatophyta (1)