Alexandrium Halim, 1960 (additional source)
Alexandrium affine (H.Inoue & Y.Fukuyo) Balech, 1995 (additional source)
Alexandrium andersonii Balech, 1990 (additional source)
Alexandrium angustitabulatum F.J.R.Taylor, 1995 accepted as Alexandrium minutum Halim, 1960 (additional source)
Alexandrium australiense Shauna Murray, 2014 (basis of record)
Alexandrium balechii (Steidinger) Balech, 1995 (additional source)
Alexandrium catenella (Whedon & Kofoid) Balech, 1985 (additional source)
Alexandrium excavatum (Braarud) Balech & Tangen, 1985 accepted as Alexandrium tamarense (Lebour) Balech, 1995 (basis of record)
Alexandrium excavatum (Braarud) Balech & Tangen, 1985 accepted as Alexandrium tamarense (Lebour) Balech, 1995 (additional source)
Alexandrium fundyense Balech, 1985 accepted as Alexandrium catenella (Whedon & Kofoid) Balech, 1985 (additional source)
Alexandrium hiranoi Kita & Fukuyo, 1988 (additional source)
Alexandrium ibericum Balech, 1985 accepted as Alexandrium minutum Halim, 1960 (additional source)
Alexandrium leei Balech, 1985 (additional source)
Alexandrium lusitanicum Balech, 1985 accepted as Alexandrium minutum Halim, 1960 (basis of record)
Alexandrium lusitanicum Balech, 1985 accepted as Alexandrium minutum Halim, 1960 (additional source)
Alexandrium minutum Halim, 1960 (basis of record)
Alexandrium monilatum (J.F.Howell) Balech, 1995 (additional source)
Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985 (additional source)
Alexandrium pacificum R.W.Litaker, 2014 (basis of record)
Alexandrium peruvianum (Balech & Mendiola) Balech & Tangen, 1985 accepted as Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985 (additional source)
Alexandrium pseudogonyaulax (Biecheler) Horiguchi ex K.Yuki & Y.Fukuyo, 1992 (basis of record)
Alexandrium pseudogonyaulax (Biecheler) Horiguchi ex K.Yuki & Y.Fukuyo, 1992 (additional source)
Alexandrium tamarense (Lebour) Balech, 1995 (basis of record)
Alexandrium tamarense (Lebour) Balech, 1995 (additional source)
Alexandrium tamiyavanichii Balech, 1994 (additional source)
Alexandrium taylorii Balech, 1994 (basis of record)
Amphidinium Claperède & Lachmann, 1859 (additional source)
Amphidinium carterae Hulburt, 1957 (basis of record)
Amphidinium gibbosum (L.Maranda & Y.Shimizu) Flø Jørgensen & Shauna Murray, 2004 (basis of record)
Amphidinium klebsii Kofoid & Swezy, 1921 (additional source)
Amphidinium operculatum Claparède & Lachmann, 1859 (additional source)
Amphidinium operculatum var. gibbosum L.Maranda & Y.Shimizu, 1996 accepted as Amphidinium gibbosum (L.Maranda & Y.Shimizu) Flø Jørgensen & Shauna Murray, 2004 (additional source)
Amphidoma Stein, 1883 (additional source)
Amphidoma languida Tillmann, Salas & Elbrachter, 2012 (basis of record)
Anabaena Bory de Saint-Vincent ex Bornet & Flahault, 1886 (basis of record)
Anabaena bergii Ostenfeld, 1908 accepted as Chrysosporum bergii (Ostenfeld) E.Zapomelová, O.Skácelová, P.Pumann, R.Kopp & E.Janecek, 2012 (basis of record)
Anabaena cylindrica Lemmermann, 1896 (additional source)
Anabaena lapponica Borge, 1913 (basis of record)
Anabaena macrospora Klebahn, 1895 accepted as Dolichospermum macrosporum (Klebhan) Wacklin, L.Hoffmann & Komárek, 2009 (additional source)
Anabaenopsis arnoldii Aptekar, 1926 (basis of record)
Anabaenopsis milleri Woronichin, 1929 (basis of record)
Anagnostidinema amphibium (C.Agardh ex Gomont) Strunecký, Bohunická, J.R.Johansen & J.Komárek, 2017 (basis of record)
Anagnostidinema lemmermannii (Woloszynska) Strunecky et al., 2017 (basis of record)
Annamia L.T.T.Nguyen, 2013 (basis of record)
Annamia toxica Nguyen, 2013 (basis of record)
Aphanizomenon A.Morren ex Bornet & Flahault, 1888 (additional source)
Aphanizomenon flosaquae Ralfs ex Bornet & Flahault, 1886 (basis of record)
Aphanizomenon gracile (Lemmermann) Lemmermann, 1907 (basis of record)
Aphanizomenonaceae Elenkin (basis of record)
Arthrospira Sitzenberger ex Gomont, 1892 (basis of record)
Arthrospira fusiformis (Voronichin) Komárek & J.W.G.Lund, 1990 accepted as Limnospira fusiformis (Voronichin) Nowicka-Krawczyk, Mühlsteinová & Hauer, 2019 (basis of record)
Aureococcus Hargraves & Sieburth, 1988 (basis of record)
Aureococcus anophagefferens Hargraves & Sieburth, 1988 (basis of record)
Aureoumbra D.A.Stockwell, DeYoe, Hargraves & P.W.Johnson, 1997 (basis of record)
Aureoumbra lagunensis D.A.Stockwell, DeYoe, Hargraves & P.W.Johnson, 1997 (basis of record)
Azadinium Elbrächter & Tillmann, 2009 (additional source)
Azadinium dexteroporum Percopo & Zingone, 2013 (basis of record)
Azadinium poporum Tillmann & Elbrächter, 2011 (basis of record)
Azadinium spinosum Elbrächter & Tillmann, 2009 (additional source)
Blennothrix lyngbyacea (Kützing ex Gomont) Anagnostidis & Komárek, 1988 (additional source)
Calothrix C.Agardh ex Bornet & Flahault, 1886 (additional source)
Calothrix parietina Thuret ex Bornet & Flahault, 1886 (basis of record)
Centrodinium punctatum (Cleve) F.J.R.Taylor, 1976 (additional source)
Chattonella B.Biecheler, 1936 (basis of record)
Chattonella antiqua (Y.Hada) C.Ono, 1980 (basis of record)
Chattonella globosa Y.Hara & M.Chihara, 1994 accepted as Vicicitus globosus (Y.Hara & Chihara) F.H.Chang, 2012 (basis of record)
Chattonella japonica (S.Toriumi & H.Takano) Loeblich III & K.E.Fine, 1977 accepted as Fibrocapsa japonica S.Toriumi & H.Takano, 1973 (basis of record)
Chattonella marina (Subrahmanyan) Hara & Chihara, 1982 (basis of record)
Chattonella marina var. antiqua (Hada) Demura & Kawachi, 2009 accepted as Chattonella antiqua (Y.Hada) C.Ono, 1980 (basis of record)
Chattonella marina var. ovata (Y.Hara & Chihara) Demura & Kawachi, 2009 accepted as Chattonella ovata Y.Hara & M.Chihara, 1994 (basis of record)
Chattonella ovata Y.Hara & M.Chihara, 1994 (basis of record)
Chattonella subsalsa B.Biecheler, 1936 (basis of record)
Chattonella verruculosa Y.Hara & M.Chihara, 1994 accepted as Pseudochattonella verruculosa (Y.Hara & M.Chihara) S.Tanabe-Hosoi, D.Honda, S.Fukaya, Y.Inagaki & Y.Sako, 2007 (basis of record)
Chattonellaceae J. Throndsen (basis of record)
Chattonellales (basis of record)
Chlorophyceae (basis of record)
Chrysochromulina Lackey, 1939 (additional source)
Chrysochromulina leadbeateri Estep, Davis, Hargreaves & Sieburth, 1984 (basis of record)
Chrysochromulina polylepis Manton & Parke, 1962 accepted as Prymnesium polylepis (Manton & Parke) Edvardsen, Eikrem & Probert, 2011 (additional source)
Chrysochromulinaceae (basis of record)
Chrysosporum E.Zapomelová, O.Skaácelová, P.Pumann, R.Kopp & E.Janecek, 2012 (basis of record)
Chrysosporum bergii (Ostenfeld) E.Zapomelová, O.Skácelová, P.Pumann, R.Kopp & E.Janecek, 2012 (basis of record)
Chrysosporum ovalisporum (Forti) E.Zapomelová, O.Skácelová, P.Pumann, R.Kopp & E.Janecek, 2012 (basis of record)
Coccolithophyceae (basis of record)
Cochlodinium heterolobatum E.S.Silva, 1967 accepted as Margalefidinium polykrikoides (Margalef) F.Gómez, Richlen & D.M.Anderson, 2017 (basis of record)
Cochlodinium heterolobatum E.S.Silva, 1967 accepted as Margalefidinium polykrikoides (Margalef) F.Gómez, Richlen & D.M.Anderson, 2017 (additional source)
Cochlodinium polykrikoides Margalef, 1961 accepted as Margalefidinium polykrikoides (Margalef) F.Gómez, Richlen & D.M.Anderson, 2017 (additional source)
Coleofasciculaceae (basis of record)
Coolia Meunier, 1919 (additional source)
Coolia tropicalis M.A.Faust, 1995 (additional source)
Cryptomonas lima Ehrenberg, 1860 accepted as Prorocentrum lima (Ehrenberg) F.Stein, 1878 (additional source)
Cryptophyta (basis of record)
Cyanobium R.Rippka & G.Cohen-Bazire, 1983 (additional source)
Cyanobium bacillare (Butcher) Komárek, Kopeck & Cepák, 1999 (basis of record)
Cyanophyceae (basis of record)
Cylindrospermopsis G.Seenayya & N.Subba Raju, 1972 (basis of record)
Cylindrospermopsis raciborskii (Woloszynska) Seenayya & Subba Raju, 1972 accepted as Raphidiopsis raciborskii (Wołoszyńska) Aguilera, Berrendero Gómez, Kaštovský, Echenique & Salerno, 2018 (basis of record)
Cylindrospermum stagnale Bornet & Flahault, 1886 (basis of record)
Dinoflagellata (basis of record)
Dinophysidae accepted as Dinophysaceae Bütschli, 1885 (source of synonymy)

English ant-like flower beetles for Anthicidae Latreille, 1819
English black siphon weed [from synonym] for Polysiphonia fucoides (Hudson) Greville, 1824
English bushy berry wrack [from synonym] for Cystoseira baccata (S.G.Gmelin) P.C.Silva, 1952
Swedish fjäderslick [from synonym] for Polysiphonia fucoides (Hudson) Greville, 1824

 LSID

 for Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985

urn:lsid:algaebase.org:taxname:47212 [details]

 LSID

 for Gambierdiscus yasumotoi M.J.Holmes, 1998

urn:lsid:algaebase.org:taxname:50500 [details]