1. PROTOCOCCOIDEÆ: Volvocaceæ, Tetrasporaceæ, Chlorosphæraceæ,
Pleurococcaceæ, Protococcaceæ, Hydrodictyaceæ.
2. CONFERVOIDEÆ: Ulvaceæ, Ulothricaceæ, Chætophoraceæ, Mycoideaceæ,
Cylindrocapsaceæ, Œdogoniaceæ, Coleochætaceæ, Cladophoraceæ,
Gomontiaceæ, Sphæropleaceæ.
3. SIPHONEÆ: Botrydiaceæ, Bryopsidaceæ, Derbesiaceæ, Vaucheriaceæ,
Phyllosiphonaceæ, Caulerpaceæ, Codiaceæ, Valoniaceæ, Dasycladaceæ.