• Gonyaulax Diesing, 1866
• Gonyaulax acatenella Whedon & Kofoid, 1936 accepted as Alexandrium acatenella (Whedon & Kofoid) Balech, 1985
• Gonyaulax aculeata K.W. Klement
• Gonyaulax acuta Kofoid & Michener, 1911
• Gonyaulax africana Schiller, 1929
• Gonyaulax alaskensis Kofoid, 1911
• Gonyaulax ambigua
• Gonyaulax apiculata (Pénard) Entz, 1904
• Gonyaulax apionis Cookson & Eisenack †
• Gonyaulax areolata Kofoid & Michener, 1911
• Gonyaulax austriaca Schiller, 1926 accepted as Gonyaulax apiculata (Pénard) Entz, 1904
• Gonyaulax balechii K.A. Steidinger, 1971 accepted as Alexandrium balechii (Steidinger) F.J.R. Taylor, 1979
• Gonyaulax baltica M.E. Ellegaard, J. Lewis & I. Harding, 2002
• Gonyaulax birostris Stein, 1883
• Gonyaulax bispinosa Kofoid & Michener, 1911
• Gonyaulax borealis Nordli, 1951
• Gonyaulax braarudii Hasle, 1960
• Gonyaulax brevisulcata P. Dangeard, 1927
• Gonyaulax bruunii F.J.R. Taylor, 1976
• Gonyaulax bulloidea Cookson & Eisenack †
• Gonyaulax buxus E. Balech
• Gonyaulax catenata (Levander) Kofoid, 1911 accepted as Peridiniella catenata (Levander) Balech, 1977
• Gonyaulax catenella Whedon & Kofoid, 1936 accepted as Alexandrium catenella (Whedon & Kofoid) Balech, 1985
• Gonyaulax ceratocoroides Kofoid, 1910
• Gonyaulax clathrata Cookson & Eisenack †
• Gonyaulax clevei Ostenfeld, 1901 accepted as Gonyaulax apiculata (Pénard) Entz, 1904
• Gonyaulax cochlea Meunier, 1919
• Gonyaulax cohorticula E. Balech, 1967 accepted as Alexandrium cohorticula (Balech) Balech, 1985
• Gonyaulax concava (Gaarder) Balech, 1967 accepted as Alexandrium concavum (K.R. Gaarder) E. Balech, 1985
• Gonyaulax conjuncta Wood, 1954
• Gonyaulax culmula G. Norris
• Gonyaulax dangeardii (P. Dangeard) Schiller, 1935
• Gonyaulax depressum (Gaarder) Balech, 1979 accepted as Alexandrium depressum (Gaarder) Balech & Tangen, 1985
• Gonyaulax diacantha (Meunier) Schiller, 1937 accepted as Gonyaulax verior Sournia, 1973
• Gonyaulax diacantha Athanassopoulos, 1931
• Gonyaulax diaphanis Cookson & Eisenack †
• Gonyaulax diegensis Kofoid, 1911
• Gonyaulax digitale Lemmermann, 1899
• Gonyaulax digitalis (C.H.G. Pouchet) Kofoid, 1911
• Gonyaulax dimorpha Biecheler, 1952
• Gonyaulax edwardsi Cookson & Eisenack †
• Gonyaulax eisenacki
• Gonyaulax elegans Rampi, 1951
• Gonyaulax elongata (Reid) Ellegaard, Daugbjerg, Rochon, J. Lewis & Harding, 2003
• Gonyaulax eumorpha Cookson & Eisenack †
• Gonyaulax excavata (Braarud) Balech, 1971 accepted as Alexandrium tamarense (Lebour) E. Balech, 1995
• Gonyaulax expansa Kofoid & Michener, 1911
• Gonyaulax fragilis (Schütt) Kofoid, 1911
• Gonyaulax fratercula E. Balech, 1964 accepted as Alexandrium fraterculus (Balech) Balech, 1985
• Gonyaulax fraterculus E. Balech, 1964
• Gonyaulax fusiformis H.W. Graham, 1942
• Gonyaulax globosa (Braarud) Balech, 1971 accepted as Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985
• Gonyaulax globosum Schiller, 1929 accepted as Gonyaulax sphaeroidea Kofoid, 1911
• Gonyaulax glyptorhynchus Murray & Whitting, 1899 accepted as Gonyaulax birostris Stein, 1883
• Gonyaulax grabrielae Schiller, 1935
• Gonyaulax gracilis Schiller, 1935
• Gonyaulax grindleyi Reinecke, 1967
• Gonyaulax helensis Woloszynska, 1928
• Gonyaulax helicoides
• Gonyaulax highlei Murray & Whitting, 1899 accepted as Gonyaulax birostris Stein, 1883
• Gonyaulax hyalina Ostenfeld & Schmidt, 1901
• Gonyaulax hyalodermopsis Cookson & Eisenack †
• Gonyaulax hyperborea (Cleve, 1900) Paulsen, 1903 accepted as Amylax triacantha (Jorgensen) Sournia, 1984
• Gonyaulax inclinata Kofoid & Michener, 1911
• Gonyaulax inflata (Kofoid) Kofoid, 1911
• Gonyaulax joliffei Murray & Whitting accepted as Spiraulax joliffei (Murray & Whitting) Kofoid accepted as Spiraulax kofoidii H.W. Graham, 1942
• Gonyaulax jolliffei Murray & Whitting accepted as Spiraulax jolliffei (Murray & Whitting) Kofoid, 1911
• Gonyaulax kofoidii Pavillard, 1909
• Gonyaulax kutnerae E. Balech, 1979 accepted as Alexandrium kutnerae (E. Balech) E. Balech, 1985
• Gonyaulax lebourae Balech, 1979
• Gonyaulax lebouriae Balech, 1979
• Gonyaulax levanderi (Lemmermann) Paulsen, 1907 accepted as Gonyaulax spinifera (Claparède & Lachmann) Diesing, 1866
• Gonyaulax ligustica Rampi, 1951
• Gonyaulax limnetica Lindemann, 1918 accepted as Gonyaulax apiculata (Pénard) Entz, 1904
• Gonyaulax loculata Meunier, 1919
• Gonyaulax longicornu P.H. Campbell, 1973
• Gonyaulax longispina Lebour, 1925 accepted as Gonyaulax verior Sournia, 1973
• Gonyaulax macroporus Mangin, 1922
• Gonyaulax margeritifera Cookson & Eisenack †
• Gonyaulax matkovichii Schiller, 1929
• Gonyaulax membranacea (M.R. Rossignol) Ellegaard, Daugbjerg, Rochon, J. Lewis & Harding, 2003
• Gonyaulax milneri (Murray & Whitting) Kofoid, 1911
• Gonyaulax minima Matzenauer
• Gonyaulax minuta Kofoid & Michener, 1911
• Gonyaulax mitra (Schütt) Kofoid, 1911 accepted as Schuettiella mitra (Schütt) E. Balech, 1988
• Gonyaulax monacantha Pavillard, 1916
• Gonyaulax monilata J.F. Howell, 1953 accepted as Alexandrium monilatum (J.F. Howell) Balech, 1995
• Gonyaulax monilatum (Howell) Loeblich III accepted as Alexandrium monilatum (J.F. Howell) Balech, 1995
• Gonyaulax monospina Rampi, 1951
• Gonyaulax muderongensis Cookson & Eisenack †
• Gonyaulax nigricans (Schiller) E. Balech, 1988
• Gonyaulax nivicola (Meunier) Kofoid, 1911
• Gonyaulax obliqua Lemmernann, 1899
• Gonyaulax orientalis Lindemann, 1924
• Gonyaulax orientalis Lindemann, 1924 sec Lebour, 1925 accepted as Gonyaulax lebourae Balech, 1979
• Gonyaulax ostenfeldii (Paulsen) Paulsen, 1949 accepted as Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985
• Gonyaulax ovalis Schiller, 1929
• Gonyaulax ovata Matzenauer, 1933
• Gonyaulax pacifica Kofoid, 1907
• Gonyaulax palustris Lemmermann, 1907 accepted as Dinosphaera palustris (Lemmermann) Kofoid & Michener, 1912