[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Class Dinophyceae Pascher (1914)
       Subclass Peridiniphycidae Fensome, F.J.R. Taylor, G. Norris, Sarjeant, Wharton & G.L. Williams (1993)
         Order Peridiniales Haeckel (1894)
           Suborder Peridiniineae Poche (1913) see Order Peridiniales Haeckel (1894)
             Family Peridiniaceae Ehrenb. (1831)
               Subfamily Protoperidinioideae see Family Protoperidiniaceae Balech (1988), nom. cons.
                 Genus Protoperidinium Bergh (1881)
                   01 Protoperidinium brevipes (Paulsen) Balech
                   02 Protoperidinium brochi (Kofoid & Swezy) Balech see Protoperidinium brochii (Kofoid & Swezy) Balech
                   03 Protoperidinium claudicans (Paulsen) Balech
                   04 Protoperidinium conicoides (Paulsen) Balech
                   05 Protoperidinium conicum (Gran) Balech
                   06 Protoperidinium crassipes (Kofoid) Balech
                   07 Protoperidinium depressum (Bailey) Balech
                   08 Protoperidinium diabolus (Cleve) Balech
                   09 Protoperidinium divergens (Ehrenb.) Balech
                   10 Protoperidinium globolus (Stein, 1883) Balech see Protoperidinium globulus (Stein) Balech
                   11 Protoperidinium grande (Kofoid) Balech
                   12 Protoperidinium granii (Ostenfeld) Balech (1974)
                   13 Protoperidinium leonis (Pavillard) Balech
                   14 Protoperidinium longipes (Karsten, 1907) Balech
                   15 Protoperidinium marielebourae (Paulsen) Balech
                   16 Protoperidinium mediterraneum (Kofoid) Balech
                   17 Protoperidinium mite (Pavillard) Balech
                   18 Protoperidinium murrayi Kofoid
                   19 Protoperidinium oblongum (Aurivillius) Parke & Dodge
                   20 Protoperidinium oceanicum (Vanhöffen) Balech
                   21 Protoperidinium oviforme (Dangeard) Balech
                   22 Protoperidinium pallidum (Ostenfeld) Balech
                   23 Protoperidinium paulseni Pavillard
                   24 Protoperidinium pedunculatum (Schütt) Balech (1974)
                   25 Protoperidinium pellucidum Bergh (1881)
                   26 Protoperidinium pentagonum (Gran) Balech
                   27 Protoperidinium punctulatum (Paulsen) Balech
                   28 Protoperidinium pyriforme (Paulsen) Balech
                   29 Protoperidinium quarnerense (Schröder) Balech
                   30 Protoperidinium similum (Paulsen) Balech see Protoperidinium simulum (Paulsen) Balech
                   31 Protoperidinium solidicorne (Mangin) Balech
                   32 Protoperidinium steinii (Jörgensen) Balech
                   33 Protoperidinium subinerme (Paulsen) Loeblich III (1969)