• Peridinium Ehrenberg, 1832
• Peridinium abei Paulsen, 1931 accepted as Protoperidinium abei (Paulsen) Balech, 1974
• Peridinium abscissum O. Zacharias, 1903
• Peridinium achromaticum Levander, 1902 accepted as Protoperidinium achromaticum (Levander) Balech, 1974
• Peridinium aciculiferum Lemmermann, 1900
• Peridinium acuminatum Ehrenberg, 1836 accepted as Goniodoma acuminatum (Ehrenberg) Stein, 1883
• Peridinium acutangulum (Lemmermann) Lemmermann
• Peridinium acutipes P.A. Dangeard
• Peridinium adeliense Balech, 1958 accepted as Protoperidinium adeliense (Balech) Balech, 1974
• Peridinium adense L. Matzenauer
• Peridinium adriaticum H. Broch
• Peridinium adriaticum L.K. Schmarda
• Peridinium adulterum Balech, 1971
• Peridinium aequalis W.S. Kent
• Peridinium affine Balech, 1958 accepted as Protoperidinium affine (Balech) Balech, 1974
• Peridinium africanoides P.A. Dangeard accepted as Protoperidinium latispinum (Mangin) Balech, 1974
• Peridinium africanum Lemmermann, 1907
• Peridinium alatum Garbini, 1902 accepted as Peridinium willei Huitfeldt-Kaas, 1900
• Peridinium aliferum K.R. Gaarder
• Peridinium allorgei Lefèvre, 1927
• Peridinium alpinum J.A.M. Perty
• Peridinium ambiguum Lindemann, 1931 accepted as Peridinium umbonatum F. Stein, 1883
• Peridinium americanum H.H. Gran & T. Braarud, 1935 accepted as Protoperidinium americanum (Gran & Braarud) Balech, 1974
• Peridinium amplum L. Matzenauer
• Peridinium ampulla Balech, 1971
• Peridinium ampulliforme E.J.F. Wood, 1954
• Peridinium anceps A.F. Meunier
• Peridinium andrzejowskii Woloszynska, 1920 accepted as Peridiniopsis penardii (Lemmermann) Bourrelly, 1968
• Peridinium anglicum G.S. West, 1909 accepted as
• Peridinium anguipes Balech
• Peridinium angustum P.A. Dangeard
• Peridinium annulatum C.A. Kofoid & J.R. Michener
• Peridinium anomaloplaxum Balech
• Peridinium anserinum Baumeister (unaccepted > nomen nudum)
• Peridinium antarcticum Schimper ex Karsten, 1905 accepted as Protoperidinium antarcticum (Schimper ex Karsten) Balech, 1973
• Peridinium anthonyi E. Fauré-Fremiet
• Peridinium apiculatum (Ehrenberg) Claparède & Lachmann, 1859 accepted as Palatinus apiculatus (Ehrenberg) S.C. Craveiro, A.J. Calado, N. Daugbjerg & Ø. Moestrup, 2009
• Peridinium apiculatum (G.S. West) Lindemann, 1928 accepted as
• Peridinium applanatum Manguin, 1926 accepted as Protoperidinium applanatum (Mangin) Balech, 1974
• Peridinium archiovatum Balech, 1958 accepted as Protoperidinium archiovatum (Balech) Balech, 1974
• Peridinium arcticum Ehrenberg accepted as Ceratium arcticum (Ehrenberg) Cleve, 1901
• Peridinium areolatum Peters, 1928 accepted as Protoperidinium areolatum (Peters) Balech, 1974
• Peridinium asperum G.H. Wailes, 1928
• Peridinium aspidiotum Balech
• Peridinium aspinum A.F. Meunier
• Peridinium assymmetricum (L.A. Mangin) C.E.H. Ostenfeld
• Peridinium asymmetrica T.H. Abé
• Peridinium asymmetricum G. Karsten
• Peridinium asymmetricum Ostenfeld, 1915 accepted as Dissodium asymmetricum (Mangin) Loeblich III, 1970 accepted as Diplopsalopsis bomba (Stein ex Jorgensen) J.D. Dodge & S. Toriumi, 1993
• Peridinium australe Playfair, 1919 accepted as Peridinium willei Huitfeldt-Kaas, 1900
• Peridinium avellana Lebour, 1925 accepted as Protoperidinium avellana (Meunier) Balech, 1974
• Peridinium baicalense Kiselev & Cvetkov, 1935
• Peridinium balechii R. Akselman, 1972
• Peridinium baliense E.R. Lindemann, 1931
• Peridinium balticum (Levander) Lemmermann, 1900
• Peridinium basilium W.S. Drugg
• Peridinium belgicum A. Wulff
• Peridinium belizense S. Carty
• Peridinium bellulum Balech, 1971 accepted as Protoperidinium bellulum (Balech) Balech, 1974
• Peridinium berolinense Lemmermann, 1900 accepted as Peridiniopsis berolinense (Lemmermann) Bourrelly, 1968
• Peridinium biconicum P.A. Dangeard, 1927 accepted as Protoperidinium biconicum (P.A. Dangeard) Balech, 1974
• Peridinium biconicum T.H. Abé
• Peridinium bicorne L.K. Schmarda
• Peridinium bimucronatum J. Schiller
• Peridinium bipes F. Stein, 1883
• Peridinium bispinum J. Schiller
• Peridinium blackmani G. Murray & F.G. Whitting, 1899 accepted as Heterodinium blackmanii (Murray & Whitting) Kofoid, 1906
• Peridinium borgei (Lemmermann) Lemmermann, 1910 accepted as Peridiniopsis borgei Lemmermann, 1904
• Peridinium braarudi J. Schiller
• Peridinium brachypus J. Schiller, 1935 accepted as Protoperidinium brachypus (Schiller) Balech, 1974
• Peridinium breve (O.W. Paulsen) O.W. Paulsen
• Peridinium brevipes Paulsen, 1908 accepted as Protoperidinium brevipes (Paulsen) Balech, 1974
• Peridinium brintoni Balech
• Peridinium brochii C.A. Kofoid & O. Swezy accepted as Protoperidinium brochii (Kofoid & Swezy) Balech
• Peridinium bulbosum K.R. Gaarder, 1954
• Peridinium bulla A.F. Meunier
• Peridinium callosum E.H. Jörgensen
• Peridinium candelabrum Ehrenberg, 1860 accepted as Ceratium candelabrum (Ehrenberg) Stein, 1883
• Peridinium capdevillei Balech
• Peridinium capurroi Balech, 1959 accepted as Protoperidinium capurroi (Balech) Balech, 1974
• Peridinium carinatum Ehrenberg
• Peridinium carolinianum Bailey, 1850 accepted as Ceratium carolinianum (Bailey) E.G. Jørgensen, 1911
• Peridinium caspicum (C.E.H. Ostenfeld) Lemmermann
• Peridinium castaneiforme L.A. Mangin
• Peridinium catenata Levander accepted as Peridiniella catenata (Levander) Balech, 1977
• Peridinium catenatum K.M. Levander accepted as Peridiniella catenata (Levander) Balech, 1977
• Peridinium caudatum Playfair, 1919 accepted as Peridinium umbonatum F. Stein, 1883
• Peridinium cavispinum L.A. Mangin
• Peridinium centenniale (Playfair) M. Lefèvre, 1932 accepted as Peridinium umbonatum F. Stein, 1883
• Peridinium cepa Balech, 1971
• Peridinium cerasus Paulsen, 1907 accepted as Protoperidinium cerasus (Paulsen) Balech, 1973
• Peridinium chalubinskii Woloszynska, 1919 accepted as Peridinium raciborskii Woloszynska, 1912
• Peridinium charcoti Balech, 1958 accepted as Protoperidinium charcotii (Balech) Balech, 1974
• Peridinium charkowiensis Matvienko, 1938 accepted as Peridiniopsis charkowiensis (Matvienko) Bourrelly, 1968
• Peridinium chattoni B. Biecheler, 1952
• Peridinium chattonii Biecheler, 1952
• Peridinium chilophaenum Ehrenberg
• Peridinium chinense J. Schiller
• Peridinium cinctum (Ehrenberg) Perty, 1852
• Peridinium cinctum (O.F. Müller) Ehrenberg, 1832