Diplopsalis R.S.Bergh, 1881 (additional source)
Diplopsalis brevis Abé, 1981 accepted as Boreadinium breve (T.H.Abé) Sournia, 1984 (original description)
Diplopsalis lebourae (Nie, 1943) Balech, 1967 accepted as Diplopsalis lebouriae (Nie) Balech, 1967 accepted as Qia lebouriae T.Liu, K.N.Mertens & H.Gu, 2015 (additional source)
Diplopsalis lenticula Bergh, 1882 (additional source)
Diplopsalis parvum (Abé) Abé, 1981 accepted as Dissodium parvum Abé, 1941 accepted as Diplopelta parva (T.H.Abé) K.Matsuoka, 1988 (additional source)
Diplopsalis torta Abé, 1941 accepted as Oblea torta (Abé) Balech ex Sournia, 1973 (additional source)
Diplopsalopsis Meunier, 1910 (additional source)
Diplopsalopsis globula Abé, 1941 (additional source)
Diplopsalopsis orbicularis (Paulsen) Meunier, 1910 (additional source)
Diplopsalopsis orbicularis var. ovata Abé, 1941 accepted as Diplopsalopsis ovata (Abé) J.D.Dodge & S.Toriumi, 1993 (additional source)
Diplopsalopsis steinii Abé, 1941 accepted as Diplopelta steinii (T.H.Abé) Balech, 1988 (additional source)
Gotoius T.H.Abé ex Matsuoka, 1988 (original description)
Gotoius mutsuensis Abé ex Matsuoka, 1988 (original description)
Peridinium Ehrenberg, 1830 (additional source)
Peridinium achromaticum Levander, 1902 accepted as Protoperidinium achromaticum (Levander) Balech, 1974 (additional source)
Peridinium angustum P.-A.Dangeard, 1927 accepted as Protoperidinium angustum (P.-A.Dangeard, 1927) Balech, 1974 (additional source)
Peridinium bipes F.Stein, 1883 (additional source)
Peridinium brevipes Paulsen, 1908 accepted as Protoperidinium brevipes (Paulsen, 1908) Balech, 1974 (additional source)
Peridinium cinctum (O.F.Müller) Ehrenberg, 1832 (additional source)
Peridinium claudicans Paulsen, 1907 accepted as Protoperidinium claudicans (Paulsen, 1907) Balech, 1974 (additional source)
Peridinium clavus T.H.Abe, 1936 accepted as Protoperidinium denticulatum (Gran & Braarud, 1935) Balech, 1974 (additional source)
Peridinium complanatum G.Karsten, 1907 (additional source)
Peridinium compressum (Abé) Nie accepted as Protoperidinium compressum (Abé) Balech, 1974 (additional source)
Peridinium conicoides Paulsen, 1905 accepted as Protoperidinium conicoides (Paulsen) Balech, 1973 (additional source)
Peridinium conicum (Gran) Ostenfeld & Schmidt, 1902 accepted as Protoperidinium conicum (Gran) Balech, 1974 (additional source)
Peridinium crassipes Kofoid, 1907 accepted as Protoperidinium crassipes (Kofoid, 1907) Balech, 1974 (additional source)
Peridinium decipiens Jörgensen, 1899 accepted as Protoperidinium decipiens (Jörgensen) Parke & J.D.Dodge, 1976 (additional source)
Peridinium deficiens Meunier, 1919 accepted as Protoperidinium deficiens (Meunier, 1919) Balech, 1974 (additional source)
Peridinium depressum Bailey, 1854 accepted as Protoperidinium depressum (Bailey, 1854) Balech, 1974 (additional source)
Peridinium elegans Cleve, 1900 accepted as Protoperidinium elegans (Cleve, 1900) Balech, 1974 (additional source)
Peridinium excentricum Paulsen, 1907 accepted as Protoperidinium excentricum (Paulsen, 1907) Balech, 1974 (additional source)
Peridinium globifera Abé, 1981 accepted as Protoperidinium globiferum (Abé, 1981) Balech, 1994 (original description)
Peridinium globulus Stein, 1883 accepted as Protoperidinium quarnerense (B.Schröder, 1900) Balech, 1974 (additional source)
Peridinium grande Kofoid, 1907 accepted as Protoperidinium grande (Kofoid, 1907) Balech, 1974 (additional source)
Peridinium granii Ostenfeld, 1907 accepted as Protoperidinium granii (Ostenfeld) Balech, 1974 (additional source)
Peridinium hemisphaericum T.H.Abé, 1936 accepted as Protoperidinium hemisphaericum (T.H.Abé) Balech, 1988 (additional source)
Peridinium hirobis Abé, 1927 accepted as Protoperidinium hirobis (T.H.Abé) Balech, 1974 (additional source)
Peridinium leonis Pavillard, 1916 accepted as Protoperidinium leonis (Pavillard, 1916) Balech, 1974 (additional source)
Peridinium majus (P.A.Dangeard) P.A.Dangeard (additional source)
Peridinium marukawae T.H.Abé, 1936 accepted as Protoperidinium marukawae (Abé, 1936) Balech, 1974 (additional source)
Peridinium monovelum Abé, 1936 accepted as Protoperidinium monovelum (T.H.Abé) Balech, 1974 (additional source)
Peridinium multistriatum C.A.Kofoid accepted as Protoperidinium multistriatum (Kofoid) (additional source)
Peridinium munobis Abé, 1927 accepted as Protoperidinium munobis (Abé, 1927) Balech, 1974 (additional source)
Peridinium mutsuense T.H.Abé, 1936 accepted as Protoperidinium mutsuense (Abé, 1936) Balech, 1974 (additional source)
Peridinium oblongum (Aurivillius) Cleve, 1900 accepted as Protoperidinium oblongum (Aurivillius) Parke & Dodge, 1976 (additional source)
Peridinium oceanicum Vanhöffen, 1897 accepted as Protoperidinium oceanicum (VanHöffen, 1897) Balech, 1974 (additional source)
Peridinium pallidum Ostenfeld, 1900 accepted as Protoperidinium pallidum (Ostenfeld, 1899) Balech, 1973 (additional source)
Peridinium pellucidum (Bergh) Schütt, 1895 accepted as Protoperidinium pellucidum Bergh, 1882 (additional source)
Peridinium pentagonum Gran, 1902 accepted as Protoperidinium pentagonum (Gran, 1902) Balech, 1974 (additional source)
Peridinium punctulatum Paulsen, 1907 accepted as Protoperidinium punctulatum (Paulsen, 1907) Balech, 1974 (additional source)
Peridinium pyriforme Paulsen, 1907 accepted as Protoperidinium pyriforme (Paulsen, 1905) Balech, 1974 (additional source)
Peridinium quarnerense B.Schröder, 1900 accepted as Protoperidinium quarnerense (B.Schröder, 1900) Balech, 1974 (additional source)
Peridinium quinquecorne T.H.Abé, 1927 accepted as Peridinium quadridentatum (F.Stein) Gert Hansen, 1995 (additional source)
Peridinium rectum Kofoid, 1907 accepted as Protoperidinium rectum (Kofoid, 1907) Balech, 1974 (additional source)
Peridinium roseum O.W.Paulsen, 1904 accepted as Protoperidinium roseum (O.W.Paulsen, 1904) Balech, 1974 (additional source)
Peridinium rotundatum T.H.Abé, 1936 accepted as Protoperidinium hidemitii (Paulsen, 1949) Balech, 1994 (additional source)
Peridinium schilleri Paulsen, 1931 accepted as Protoperidinium schilleri (Paulsen, 1931) Balech, 1974 (additional source)
Peridinium sinuosum Lemmermann, 1905 accepted as Protoperidinium pentagonum (Gran, 1902) Balech, 1974 (additional source)
Peridinium solitarium T.H.Abé, 1936 accepted as Protoperidinium solitarium (Abé, 1936) Balech, 1974 (additional source)
Peridinium sphaericum Okamura, 1912 (additional source)
Peridinium sphaeroides Dangeard (additional source)
Peridinium subcurvipes Lebour, 1923 accepted as Protoperidinium subcurvipes (Lebour, 1923) Balech, 1974 (additional source)
Peridinium subinerme Paulsen, 1908 accepted as Protoperidinium subinerme (Paulsen) Loeblich III, 1969 (additional source)
Peridinium subpyriforme P.-A.Dangeard, 1927 accepted as Protoperidinium subpyriforme (P.-A.Dangeard, 1927) Balech, 1974 (additional source)
Peridinium thorianum Paulsen, 1905 accepted as Protoperidinium thorianum (Paulsen, 1905) Balech, 1973 (additional source)
Peridinium truncum T.H.Abé, 1936 accepted as Protoperidinium truncum (Abé, 1936) Balech, 1974 (additional source)
Peridinium tumidum Okamura accepted as Protoperidinium tumidum (Okamura) Balech, 1988 (additional source)
Peridinium ventralis Abé, 1936 accepted as Protoperidinium ventrale (Abé, 1936) Balech, 1974 (additional source)
Peridinium ventricum Abé, 1927 accepted as Protoperidinium ventricum (Abé, 1927) Balech, 1974 (additional source)
Peridinium volzii Lemmermann, 1905 (additional source)
Peridinium willei Huitfeldt-Kaas, 1900 (additional source)
Protoperidinium Bergh, 1881 (additional source)
Protoperidinium cerassiformis Abé, 1981 accepted as Protoperidinium acanthophorum (Balech, 1962) Balech, 1974 (original description)
Protoperidinium parvum Abé, 1981 accepted as Protoperidinium cruciferum (Balech, 1971) Balech, 1973 (original description)
Protoperidinium rhomboidalis Abé, 1981 accepted as Protoperidinium rhomboidale Abé, 1981 accepted as Protoperidinium acanthophorum (Balech, 1962) Balech, 1974 (original description)
Protoperidinium yonedae Balech, 1994 (original description)

 Environment

 for Diplopsalopsis orbicularis var. ovata Abé, 1941

Locality: Asamushi [details]

 Environment

 for Peridinium complanatum G.Karsten, 1907

Locality: Asamushi. Very rare. [details]

 Environment

 for Peridinium compressum (Abé) Nie

This peculiarly flattened species was found only in Asamushi and not a single record of this has ever been reported ... [details]

 Environment

 for Peridinium globifera Abé, 1981

Locality: Asamushi, Shimada. [details]

 Environment

 for Peridinium multistriatum C.A.Kofoid

Peridinium multistriatum was recorded for the first time by KoFOID in San Diego, but has been generally regarded as ... [details]

 Environment

 for Peridinium sphaericum Okamura, 1912

Locality: Shimoda [details]

 Environment

 for Peridinium sphaeroides Dangeard

Locality: Asamushimushi, Shimada [details]

 Environment

 for Protoperidinium cerassiformis Abé, 1981

Locality: Shimoda (For Peridinium cerassiformis) [details]

 Environment

 for Protoperidinium yonedae Balech, 1994

Locality: Shimoda (for Peridinium yonedai) [details]