Class Dinophyceae Pascher (1914)
   Order Peridiniales Haeckel (1894)
     Family Oxytoxaceae Er. Lindem. (1928)
       Genus Amphidiniopsis Wolosz. (1929)
         1023 Amphidiniopsis arenaria Hoppenrath, 2000
         1024 Amphidiniopsis cristata Hoppenrath, 2000
         1025 Amphidiniopsis dentata Hoppenrath, 2000
         1026 Amphidiniopsis galericulata Hoppenrath, 2000
         1027 Amphidiniopsis hexagona Yoshimatsu et al.
         1028 Amphidiniopsis hirsuta (E. Balech) J.D. Dodge, 1982
         1029 Amphidiniopsis kofoidii Woloszynska, 1929
         1030 Amphidiniopsis korewalensis S. Murray & Patterson (2002)
         1031 Amphidiniopsis pectinaria Toriumi, Yoshimatsu & Dodge (2002)
         1032 Amphidiniopsis swedmarkii (E. Balech) J.D. Dodge, 1982
         1033 Amphidiniopsis uroensis Toriumi, Yoshimatsu & Dodge (2002)