Ea
- Eaustrum
Ec
- Ecballocystis Bohlin, 1897
Ecballocystopsis Iyengar, 1933
- Ecballocystopsis desikacharyi A.K.S.K.Prasad [1]
- Ecballocystopsis dichotoma Z.Y.Hu & L.J.Bi C [1]
- Ecballocystopsis indica Iyengar, 1933 [1] [2]
Chlorophyta → Chlorodendrophyceae → Chlorodendrales → Chlorodendraceae
Ecdysichlamys G.S.West, 1912
- ?Ecdysichlamys minuta (R.R.L.Guillard, H.C.Bold & F.J.MacEntee) J.Komárek & A.Comas [3]
- Ecdysichlamys obliqua G.S.West [3]
- ?Ecdysichlamys transilvanica Nagy-Tóth & Barna, 1998 [3]
Chlorophyta → Trebouxiophyceae → Oocystales → Oocystaceae
- Echinocoleum C.-C.Jao & K.T.Lee, 1947
- Echinosphaerella G.M.Smith, 1920
- Echinosphaeridium Lemmermann, 1904
El
- Elaterodiscus P.[J.L.] Dangeard, 1967
- Elliptochloris Tschermak-Woess, 1980
- Elongatocystis L.Krienitz & C.Bock, 2011
Em
- Emergococcus W.W.Miller, 1921
- Emergosphaera W.W.Miller, 1921
En
- Enallax Pascher, 1943
- Endoclonium Szymanski [Czymanski], 1878
- Endoderma Lagerheim, 1883
- Endophyton N.L.Gardner, 1909
- Endosphaeraceae
- Entocladia Reinke, 1879
- Entodictyon Schiffner, 1931
- Entophysa Cbius
Eo
- Eochara Choquette
- Eovelebitella Vachard
Ep
- Epibolium Printz, 1916
- Epicladia Reinke, 1889
- Epimastopora J.V.Pia, 1937
Er
- Eremosphaera De Bary, 1858
- Eremosphaeraceae
- Ernodesmis Børgesen, 1912
Et
- Ettlia J.Komárek, 1989
- Ettliella F.Hindák, 1988
Eu
- Euastropsis Lagerheim, 1894
- Eudorina Ehrenberg, 1832
- Eugomontia Kornmann, 1960
- Eugonophyllum K.Konishi & J.L.Wray
- Eutetramorus Walton, 1918
Ex
- Excentrosphaera G.T.Moore, 1901
- Excentrosphaera G.T.Moore, 1901