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)
- Subkingdom Hacrobia
- Subkingdom Harosa (437)
- Infrakingdom Heterokonta (437)
- Phylum Ochrophyta (437)
- Subphylum Ochrophyta incertae sedis
- Subphylum Phaeista
- Class Phaeophyceae (436)
- Subclass Dictyotophycidae (74)
- Subclass Discosporangiophycidae (2)
- Subclass Fucophycidae (352)
- Order Asterocladales (1)
- Order Chordales (1)
- Order Desmarestiales (5)
- Order Ectocarpales (240)
- Family Acinetosporaceae Hamel ex J. Feldmann, 1937 (35)
- Family Chordariaceae Greville, 1830 (173)
- Family Ectocarpaceae C. Agardh, 1828 (16)
- Family Petrospongiaceae Racault et al., 2009 (1)
- Family Pilayellaceae
- Family Scytosiphonaceae Farlow, 1881 (15)
- Tribe Hydroclathreae W.J.E.Santiañez, 2018 (6)
- Tribe Scytosiphoneae W.J.E.Santiañez, 2018 (9)
- Genus Endarachne J.Agardh, 1896
- Genus Petalonia Derbès & Solier, 1850 (2)
- Genus Planosiphon McDevit & G.W.Saunders, 2017 (3)
- Genus Scytosiphon C.Agardh, 1820 (3)
- Genus Stragularia Strömfelt, 1886
- Genus Symphyocarpus Rosenvinge, 1893 (1)
- Order Fucales (64)
- Order Laminariales (14)
- Order Nemodermatales (1)
- Order Ralfsiales (8)
- Order Scytothamnales (1)
- Order Sporochnales (6)
- Order Tilopteridales (11)
- Subclass Ishigeophycidae (2)
- Order Cutleriales
- Order Phaeophyceae incertae sedis (5)
- Order Stschapoviales (1)
- Class Phaeothamniophyceae
- Class Xanthophyceae (1)
- Kingdom Plantae (1 362)