• Protogonyaulax F.J.R. Taylor, 1979 accepted as Alexandrium Halim, 1960
• Protogonyaulax acatenella (Whedon & Kofoid) Taylor, 1979 accepted as Alexandrium acatenella (Whedon & Kofoid) Balech, 1985
• Protogonyaulax affinis H. Inoue & Y. Fukuyo, 1985 accepted as Alexandrium affine (H. Inoue & Y. Fukuyo) Balech, 1995
• Protogonyaulax catenella (Whedon & Kofoid) Taylor, 1979 accepted as Alexandrium catenella (Whedon & Kofoid) Balech, 1985
• Protogonyaulax cohorticula (Balech) Taylor accepted as Alexandrium cohorticula (Balech) Balech, 1985
• Protogonyaulax compressa Y. Fukuyo, K. Yoshida & H. Inoue, 1985 accepted as Alexandrium compressum (Y. Fukuyo, K. Yoshida & H. Inoue) Balech, 1995
• Protogonyaulax excavata (Braarud) F.J.R. Taylor, 1979 accepted as Alexandrium tamarense (Lebour) E. Balech, 1995
• Protogonyaulax fratercula (Balech) Taylor accepted as Alexandrium fraterculus (Balech) Balech, 1985
• Protogonyaulax globosa (Braarud) Taylor, 1979 accepted as Alexandrium ostenfeldii (Paulsen) Balech & Tangen, 1985
• Protogonyaulax ostenfeldii (Paulsen) S. Fraga & F.J. Sánchez
• Protogonyaulax tamarensis (Lebour) F.J.R. Taylor, 1979 accepted as Alexandrium tamarense (Lebour) E. Balech, 1995