Order Peridiniales

Family Ceratiaceae Kofoid

Genus Ceratium F. Schrank

• Ceratium arcticum (Ehrenberg) Cleve – marine; planktonic (Конопля, 1974).
• Ceratium cornutum (Ehrenberg) Claparede & J. Lachmann — planktonic, rare, boggy puddles.
• Ceratium fusus (Ehrenberg) Dujardin – marine; planktonic; dominant (Конопля, 1974).
• Ceratium gravidum Gourret — marine, planktonic (Rat'kova, 2000).
• Ceratium hirundinella (O. F. Müller) Dujardin — planktonic, common, at the end of the vegetation period - dominant, lakes; in plankton of meromictic lake Trekhtzvetnoe (Ivanova, 2025, personal communication).
• Ceratium horridum (Cleve) Gran — marine, planktonic (Rat'kova, 2000).
• Ceratium longipes (Bailey) Gran – marine, planktonic (Конопля, 1974).

Family Cladopyxidaceae Poche

Genus Peridiniella Kofoid & Michener

• Peridiniella catenata (Levander) Balech – marine; planktonic (Конопля, 1974: как Gonyaulax catenata (Levander) Kofoid)
• Peridiniella danica (Paulsen) Y. B. Okolodkov & J. D. Dodge – marine; planktonic (Конопля, 1974: как Glenodinium danicum Paulsen).

Family Dinosphaeraceae Lindemann

Genus Dinosphaera Kofoid & Michener

• Dinosphaera palustris (Lemmermann) Kofoid & Michener —planktonic, rare, boggy puddles, in spews from sphagnum mosses, cape Kindo.

Family Glenodiniopsidaceae Schiller

Genus Glenodiniopsis Woloszynska

• Glenodiniopsis steinii (Lemmermann) Woloszynska — planktonic, sporadic, freshwater supralittoral pool on the north coast of the cape Kindo.

Family Gonyaulacaceae Lindemann

Genus Alexandrium Halim

• Alexandrium tamarense (Lebour) E. Balech — planktonic, sporadic, Velikaya Salma.

Genus Amylax Meunier

• Amylax triacantha (Jörgensen) Sournia — planktonic, Velikaya Salma (Житина, 1981).

Genus Gonyaulax Diesing

• Gonyaulax apiculata (Pénard) Entz — planktonic, common, brackish-water, freshwater, cape Kindo.
• Gonyaulax cochlea Meunier — planktonic, Velikaya Salma (Житина, 1981).
• Gonyaulax digitale (Pouchet) Kofoid — planktonic, Velikaya Salma (Житина, 1981).
• Gonyaulax grindleyi Reinecke – marine; planktonic (Конопля, 1974: Protoceratium reticulatum (Claparède & Lachmann) Bütschli).
• Gonyaulax polygramma Stein — planktonic, Velikaya Salma (Сёмина, Сергеева, 1983).
• Gonyaulax spinifera (Claparede & Lachmann) Diesing — planktonic, Velikaya Salma (Житина, 1981).

Family Heterocapsaceae R. A. Fensome et al.

Genus Heterocapsa Stein

• Heterocapsa triquetra (Ehrenberg) F. Stein — marine, planktonic (Rat'kova, 2000).
• Heterocapsa rotundata (Lohmann) Gert Hansen, 1995 - marine. Found in semi-isolated coastal stratified lake Kislo-Sladkoe (Plotnikov et al., 2022).

Family Oxytoxaceae Lindemann

Genus Oxytoxum Stein

• Oxytoxum belgicae Meunier — marine, planktonic (Rat'kova, 2000).
• Oxytoxum sceptrum (Stein) Schroeder — marine, planktonic (Rat'kova, 2000).
• Oxytoxum variabile Schiller — marine, planktonic (Rat'kova, 2000).

Family Peridiniaceae Ehrenberg

Genus Glenodinium C. G. Ehtrenberg ex Ralfs

• Glenodinium foliaceum Stein — planktonic, rare, Chrenorechenskaya Bay, common, brackish-water, coast of the cape Kindo.
• Glenodinium lubieniensiforme Diwald — planktonic; rare, sometimes common, freshwater supralittoral basins, cape Kindo.
• Glenodinium pulvisculus (Ehrenberg) Stein — planktonic, sporadic, boggy puddle opposite to the Bolshoi Eremeevsky Island

Genus Parvodinium Carty

• Parvodinium umbonatum (F.Stein) Carty 2008 - freshwater, planktonic, in meromictic lake Trekhtzvetnoe (Ivanova, 2025, personal communication).

Genus Peridiniopsis Lemmermann

• Peridiniopsis oculatum (F. Stein) Bourrelly — planktonic, rare, freshwater supralittoral basins, bogs, Verkhneye (Upper) Lake.
• Peridiniopsis polonicum (Woploszynska) Bourrelly — planktonic, Velikaya Salma (Сёмина, Сергеева, 1983).
• Peridiniopsis thompsonii (Thompson) Bourrelly – freshwater, Verkhneye (Upper) Lake, Vodoprovodnoye (Potable water) Lake; planktonic (Бизина, 1998: как Glenodinium quadridens (Stein) Schiller).

Genus Peridinium C. G. Ehrenberg

• Peridinium aciculiferum Lemmermann — planktonic, common, sometimes dominant, freshwater supralittoral basins, cape Kindo.
• Peridinium africanum Lemmermann – marine, area near the mouth of the Nilma river; planktonic; dominant (Лихачёва, 2003).
• Peridinium balticum (Levander) Lemmermann — planktonic, sporadic, Kislosladkoye (Sour-Sweet) Lake.
• Peridinium bipes F. Stein – freshwater, Verkhneye (Upper) Lake, Vodoprovodnoye (Potable water) Lake; planktonic (Бизина, 1998).
• Peridinium breve (O. W. Paulsen) O.W. Paulsen — planktonic, Velikaya Salma (Житина, 1981).
• Peridinium cinctum (O. F. Müller) Ehrenberg — planktonic, common, low in brackish-water and freshwater ponds, everywhere
• Peridinium minusculum J. Pavillard – marine; planktonic (Конопля, 1974).
• Peridinium willei Huitfeldt-Kaas — planktonic, rare, sometimes dominant, brackish-water supralittoral basins, сев. побережье cape Kindo; common, freshwater, everywhere

Genus Scrippsiella Balech ex A. R. Loeblich III

• Scrippsiella trochoidea (Stein) Balech ex Loeblich III – marine; planktonic (Конопля, 1974: as Peridinium trochoideum (Stein) Lemmermann). Also in semi-isloated coastal stratified lake Kislo-Sladkoe in lower aerobic horizons (Mindolina et al., 2023).

Family Protoperidiniaceae J. P. Bujak & E. H. Davies

Genus Diplopsalis Bergh

• Diplopsalis lenticula Bergh — planktonic, Velikaya Salma (Житина, 1981: as Glenodinium lenticula (Bergh) Pouchet; Rat'kova, 2000).

Genus Oblea Balech ex Loeblich Jr. & Loeblich III

• Oblea rotunda (Lebour) Balech ex Sournia — planktonic, rare, Verkhneye (Upper) Lake.

Genus Preperidinium Mangin

• Preperidinium meunieri (Pavillard) Elbrächer — marine, planktonic (Rat'kova, 2000: as Diplopeltopsis minor (Paulsen) Pavillard)

Genus Protoperidinium Bergh

• Protoperidinium achromaticum Levander — planktonic, rare, Velikaya Salma.
• Protoperidinium brevipes (Paulsen) Balech — planktonic, Velikaya Salma (Житина, 1981).
• Protoperidinium conicoides (Paulsen) Balech – marine; planktonic (Конопля, 1974: Peridinium conicoides Paulsen).
• Protoperidinium conicum (Gran) Balech – marine; planktonic (Конопля, 1974: Peridinium conicum (Gran) Ostenfeld & Schmidt).
• Protoperidinium ovatum Pouchet — planktonic, Velikaya Salma (Житина, 1981: as Peridinium globulus var. ovatum (Pouchet) Schiller).
• Protoperidinium granii (Ostenfeld) Balech — planktonic, Velikaya Salma (Житина, 1981).
• Protoperidinium leonis (Pavillard) Balech — planktonic, Velikaya Salma (Житина, 1981).
• Protoperidinium pallidum (Ostenfeld) Balech – marine; planktonic (Конопля, 1974: Peridinium pallidum Ostenfeld).
• Protoperidinium pellucidum Bergh ex Loeblich Jr. & Loeblich III – marine; planktonic (Конопля, 1974: как Peridinium pellucidum (Bergh) Schütt).
• Protoperidinium pyriforme (Paulsen) Balech — planktonic, Velikaya Salma (Сёмина, Сергеева, 1983: как Peridinium pyriforme Paulsen).
• Protoperidinium thorianum (Paulsen) Balech ex Loeblich III — planktonic, Velikaya Salma (Сёмина, Сергеева, 1983: как Peridinium thorianum Paulsen).

rus: Порядок Peridiniales