Da
- Dactylococcus Nägeli, 1849
- Dactylopora Lamarck
- Dactyloporella Gümbel
- Dactylosphaerium Steinecke, 1916
- Dactylothece Lagerheim, 1883
- Danasphaera Steemann Nielsen
- Dangeardinella Pascher
- Dangeardinellaceae
- Dangemannia Friedl & O'Kelly, 2002
- Danubia F.Hindák, 1977
- Dasycladaceae Kützing, 1843
- Dasycladales
- Dasycladus C.Agardh, 1828
- Dasyporella Stolley, 1893
De
Deasonia H. Ettl & J. Komárek
- Deasonia bispora (Deason) Ettl & Gaertner
- Deasonia irregularis (Deason) Ettl & Gaertner
- Deasonia multinucleata (Deason & Bold) Ettl & Komarek
- Deasonia prolifera (T.R. Deason) H. Ettl & J. Komárek; tipična vrsta
- Deasonia punctata (Arce & Bold) Ettl & Komarek
- Deasonia saccata (Deason) Ettl & Komarek
Chlorophyta → Chlorophyceae → Chlamydomonadales → Actinochloridaceae
- Deflandrastrum A.Combaz
- Dendrocystis Iyengar, 1962
- Dendronema Schmidle, 1897
- Derbesia Solier, 1846
- Derbesiaceae
- Derbesiaceae Hauck, 1884
- Dermatophyton A.Peter, 1886
- Desmatractum West & G.S West, 1902
- Desmochloris S.Watanabe, N.Kuroda & F.Maiwa, 2001
- Desmococcus F.Brand, 1925
- Desmodesmoideae
- Desmodesmus (R.Chodat) S.S.An, T.Friedl & E.Hegewald, 1999
- Desmotetra T.R.Deason & G.L.Floyd, 1987
- Deuterocharacium Petrý, 1969
Di
- Diaphragma L.Geitler, 1942
- Dicellula Svirenko, 1926
- Dichotomococcus Korshikov, 1928
- Dichotomosiphon A.Ernst, 1902
- Dichotomosiphonaceae
- Dichotomosiphonaceae
- Dicloster C.-C.Jao, Y.S.Wei & H.C.Hu, 1976
- Dicranochaete Hieronymus, 1890
- Dictyastrum Beck von Mannagetta, 1926
- Dictyochlorella P.C.Silva, 1959
- Dictyochloris Vischer, 1945
- Dictyochloropsis Geitler, 1966
- Dictyoclavator L.J.Grambast
- Dictyococcus Gerneck, 1907
- Dictyosphaeria Decaisne, 1842
- Dictyosphaeriaceae West, 1916
- Dictyosphaerium Nägeli, 1849
Dictyotidium Eisenack, 1955
- Dictyotidium cambriense Slavíková †
- Dictyotidium craticula (E.Wicander & A.R.Loeblich) R.Wicander & G.Playford †
- Dictyotidium dictyotum (Eisenack) Eisenack †
- Dictyotidium eastendense S.A.J.Pocock †
- Dictyotidium hasletianum Vanguestaine †
- Dictyotidium tenuiornatum'' Eisenack †
Chlorophyta → Prasinophyceae → Prasinophyceae incertae sedis
- Didiymidium
- Didymidium
- Didymocystis Korshikov, 1953
- Didymogenes Schmidle, 1905
- Didymogenopsis Hortobágyi
- Didymosporangium F.D.Lambert, 1912
- Didymothrix Y.X.Wei & H.J.Hu, 1991
- Diectochara Musacchio
- Digitella L.Morellet & J.Morellet
- Dilabifilum Tschermak-Woess, 1971
- Dimorphococcopsis C.-C.Jao, 1959
- Dimorphococcus Braun, 1855
- Diogenes Pennington, 1941
- Dioriticamonas Skvortzov, 1971
- Diplochloris Korshikov, 1939
- Diploglossa C.J.E.Morren
- Diplosphaera M.W.Bialosuknia, 1909
- Diplostauron A.A.Korschikov, 1925
- Discerea
- Diselmis Dujardin
- Disphinctium
- Dispora H.Printz, 1913
- Dissocladella Pia
- Diversoporella Gnilovskaya
Do
- Dobunniella G.F.Elliott
- Docidiopsis Raciborski
- Dolichomastigaceae Marin & Melkonian, 2010
- Dolichomastigales
- Dolichomastix Manton, 1977
Dr
- Draparnaldia Bory de Saint-Vincent, 1808
- Draparnaldioides C.Meyer & Skabichevskij, 1976
- Draparnaldiopsis G.M.Smith & Klyver, 1929
Du
- Dunaliella Teodoresco, 1905
- Dunaliellaceae T. Christensen, 1967
- Dunaliellales
Dy
- Dysmorphococcus Takeda, 1916