Glenodinium bipes Paulsen, 1904 accepted as Protoperidinium bipes (Paulsen, 1904) Balech, 1974 (additional source)
Peridinium achromaticum Levander, 1902 accepted as Protoperidinium achromaticum (Levander) Balech, 1974 (additional source)
Peridinium grenlandicum Woloszynska, 1929 accepted as Protoperidinium grenlandicum (Woloszynska) Balech, 1974 (basis of record)
Peridinium quinquecorne T.H.Abé, 1927 accepted as Peridinium quadridentatum (F.Stein) Gert Hansen, 1995 (additional source)
Protoperidinium Bergh, 1881 (additional source)
Protoperidinium achromaticum (Levander) Balech, 1974 (new combination reference)
Protoperidinium avellana (Meunier, 1919) Balech, 1974 (new combination reference)
Protoperidinium biconicum (P.A.Dangeard) Balech, 1974 (new combination reference)
Protoperidinium bipes (Paulsen, 1904) Balech, 1974 (new combination reference)
Protoperidinium brevipes (Paulsen, 1908) Balech, 1974 (new combination reference)
Protoperidinium brochii (Kofoid & Swezy, 1921) Balech, 1974 (new combination reference)
Protoperidinium cerasus (Paulsen, 1907) Balech, 1973 (additional source)
Protoperidinium claudicans (Paulsen, 1907) Balech, 1974 (new combination reference)
Protoperidinium conicoides (Paulsen) Balech, 1973 (new combination reference)
Protoperidinium conicum (Gran) Balech, 1974 (new combination reference)
Protoperidinium crassipes (Kofoid, 1907) Balech, 1974 (new combination reference)
Protoperidinium curtipes (Jørgensen, 1912) Balech, 1974 (new combination reference)
Protoperidinium curvipes (Ostenfeld) Balech, 1974 (new combination reference)
Protoperidinium defectum (Balech, 1965) Balech, 1974 (new combination reference)
Protoperidinium deficiens (Meunier, 1919) Balech, 1974 (new combination reference)
Protoperidinium denticulatum (Gran & Braarud, 1935) Balech, 1974 (new combination reference)
Protoperidinium depressum (Bailey, 1854) Balech, 1974 (new combination reference)
Protoperidinium diabolus (Cleve, 1900) Balech, 1974 (new combination reference)
Protoperidinium divergens (Ehrenberg) Balech, 1974 (new combination reference)
Protoperidinium excentricum (Paulsen, 1907) Balech, 1974 (new combination reference)
Protoperidinium globulus (Stein, 1883) Balech, 1974 (new combination reference)
Protoperidinium grande (Kofoid, 1907) Balech, 1974 (new combination reference)
Protoperidinium granii (Ostenfeld) Balech, 1974 (new combination reference)
Protoperidinium groenlandicum (Woloszynska, 1929) Balech (new combination reference)
Protoperidinium inflatum (Okamura, 1912) Balech, 1974 (new combination reference)
Protoperidinium islandicum (Paulsen, 1904) Balech, 1973 (additional source)
Protoperidinium laticeps (Grontved & Seidenfaden, 1938) Balech, 1974 (new combination reference)
Protoperidinium leonis (Pavillard, 1916) Balech, 1974 (new combination reference)
Protoperidinium ligusticum (Rampi, 1951) Balech, 1974 (new combination reference)
Protoperidinium longispinum (Kofoid, 1907) Balech, 1974 (new combination reference)
Protoperidinium marielebouriae (Paulsen, 1931) Balech, 1974 (new combination reference)
Protoperidinium mediterraneum (Kofoid, 1909) Balech, 1974 (new combination reference)
Protoperidinium minutum (Kofoid) Loeblich III, 1970 accepted as Archaeperidinium minutum (Kofoid) Jørgensen, 1912 (additional source)
Protoperidinium mite (Pavillard, 1916) Balech, 1974 (new combination reference)
Protoperidinium nudum (Meunier, 1919) Balech, 1974 (new combination reference)
Protoperidinium oceanicum (VanHöffen, 1897) Balech, 1974 (new combination reference)
Protoperidinium ovatum Pouchet, 1883 (additional source)
Protoperidinium oviforme (Dangeard, 1927) Balech, 1974 (new combination reference)
Protoperidinium ovum (Schiller, 1911) Balech, 1974 (new combination reference)
Protoperidinium pallidum (Ostenfeld, 1899) Balech, 1973 (additional source)
Protoperidinium pedunculatum (Schütt, 1895) Balech, 1974 (new combination reference)
Protoperidinium pellucidum Bergh, 1882 (additional source)
Protoperidinium pentagonum (Gran, 1902) Balech, 1974 (new combination reference)
Protoperidinium punctulatum (Paulsen, 1907) Balech, 1974 (new combination reference)
Protoperidinium pyriforme (Paulsen, 1905) Balech, 1974 (new combination reference)
Protoperidinium quarnerense (B.Schröder, 1900) Balech, 1974 (new combination reference)
Protoperidinium quinquecorne (Abé, 1927) Balech, 1974 accepted as Peridinium quadridentatum (F.Stein) Gert Hansen, 1995 (new combination reference)
Protoperidinium roseum (O.W.Paulsen, 1904) Balech, 1974 (new combination reference)
Protoperidinium schilleri (Paulsen, 1931) Balech, 1974 (new combination reference)
Protoperidinium simulum (Paulsen, 1931) Balech, 1974 (new combination reference)
Protoperidinium solidicorne (Mangin, 1926) Balech, 1974 (new combination reference)
Protoperidinium sphaericum (Murray & Whitting, 1899) Balech, 1974 (new combination reference)
Protoperidinium sphaeroides (P.-A.Dangeard, 1927) Balech, 1974 (new combination reference)
Protoperidinium steinii (Jørgensen, 1899) Balech, 1974 (new combination reference)
Protoperidinium subcurvipes (Lebour, 1923) Balech, 1974 (new combination reference)
Protoperidinium subinerme (Paulsen) Loeblich III, 1969 (additional source)
Protoperidinium thorianum (Paulsen, 1905) Balech, 1973 (new combination reference)
Protoperidinium thulesense (Balech) Balech, 1974 (new combination reference)
Protoperidinium tregouboffii (Halim, 1955) Balech, 1974 (new combination reference)
Protoperidinium tristylum (Stein, 1883) Balech, 1974 (new combination reference)
Protoperidinium tuba (Schiller) Balech, 1974 (new combination reference)
Protoperidinium wiesneri (Schiller, 1911) Balech, 1974 (new combination reference)