Stramenopile

The heterokonts or stramenopiles are a major line of eukaryotes with more than 100,000 known species, most of them diatoms.

Heterokonts
Pacific rockweed, Fucus distichus, in Olympic National Park
Scientific classification
Domain:	Eukarya
Kingdom:	Chromalveolata
Phylum:	Heterokontophyta
Typical classes
Colored groups (alga-like) Actihrysophyceae (axodines) Bacillariophyceae (diatoms) Bolidophyceae Chrysophyceae (golden algae) Eustigmatophyceae Pelagophyceae Phaeophyceae (brown algae) Phaeothamniophyceae Raphidophyceae Synurophyceae Xanthophyceae (yellow-green algae) Colorless groups (fungus-like) Bicosoecea Hyphochytridiomycetes Labyrinthulomycetes (slime nets) Oomycetes (water moulds) Opalinea Proteromonadea Blastocystis

Heterokonts are mostly algae. In one stage of their life cycle they have two unequal flagella. They include both single-celled types and brown algae (seaweeds such as kelp and Sargassum). They are members of the Kingdom Chromalveolata.

Phylogeny

Stramenopiles

Platysulcidae Shiratori, Nkayama & Ishida 2015 Sagenista Eogyrea Labyrinthulea Bikosea Cavalier-Smith 2013 Placidozoa Placididea Moriya, Nakayama & Inouye 2002 Nanomonadea Cavalier-Smith 2013 Opalomonadea Cavalier-Smith 2013 Opalinata Blastocystea Zierdt et al. 1967 Opalinea Wenyon 1926 emend. Cavalier-Smith 1993 Gyrista Bigyromonadea Cavalier-Smith 1998 Oomycota Arx 1967 Hyphochytriomycota Whittaker 1969 Pirsoniales Cavalier-Smith 1998 Ochrophyta Khakista Bolidophyceae Guillou & Chretiennot-Dinet 1999 Bacillariophyceae Haeckel 1878 Phaeista Hypogyristea Dictyochophyceae Silva 1980 s.l. Chrysista Eustigmista Pinguiophyceae Kawachi et al. 2002 Eustigmatophyceae Hibberd & Leedale 1971 Phagochrysia Picophagea Cavalier-Smith 2006 Leukarachnion Geitler 1942 Chrysophyceae Pascher 1914 Xanthophytina Raphidoistia Raphidophyceae s.l. Fucistia Phaeophyceae (brown seaweeds) Hansgirg 1886 Chrysomerophyceae Cavalier-Smith 1995 Phaeothamniophyceae Andersen & Bailey 1998 s.l. Xanthophyceae (yellow-green algae) Allorge 1930 emend. Fritsch 1935