Order Cymbellales
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Genus Anomoeoneis Pfitzer
- Anomoeoneis brachysira (Brébisson) Cleve var. brachysira — periphyton, bogs, lakes (Dressler, Hübener, 2002).
- Anomoeoneis serians (Brébisson) Cleve — planktonic, common in summer, Velikaya Salma; dominant, mouth of the Chernaya River (Бондпарчук, 1963); periphyton, bogs, lakes (Dressler, Hübener, 2002).
- Anomoeoneis sphaerophora E. Pfitzer – marine, littoral; benthic, periphyton, sporadic (Бондарчук, 1970).
Genus Staurophora Mereschkowsky
- Staurophora amphioxys (Gregory) D.G. Mann – marine, littoral, Rugozerskaya Bay; single finding (Бондарчук, 1970: Stauroneis gregorii Ralfs ex Pritchard).
- Staurophora wislouchii (Poretzky & Anisimova) Mereschkowsky — marine, common, littoral (Сапожников, 1998: as Stauroneis wislouchii f. parva Poretzky & Anisimova).
Family Cymbellaceae Greville
Genus Brebissonia A. Grunow
- Brebissonia boeckii (Ehrenberg) E. O’Meara – marine, littoral; benthic, periphyton; sporadic (Бондарчук, 1970; Сапожников, 1998).
Genus Cymbella C. Agardh
- Cymbella affinis Kützing – marine, littoral; everywhere, in some areas abundant, in diluted areas (Бондарчук, 1970). Freshwater; periphyton (Dressler, 2003: C. affinis and C. cymbiformis var. cymbiformis Agardh and C. cymbiformis var. nonpunctata Fontell).
- Cymbella amphicephala Näegeli var. hercynica (A. Schmidt) Cleve – freshwater; periphyton (Dressler, 2003).
- Cymbella aspera (Ehrenberg) Cleve – freshwater; periphyton (Dressler, 2003).
- Cymbella caespitosa (Kützing) Brun — periphyton, bogs, lakes (Dressler, Hübener, 2002).
- Cymbella cistula (Hemprich & Ehrenberg) O. Kirchner – marine, littoral; often in diluted areas (Бондарчук, 1970: C. cistula (Hemp.) Grun.). Freshwater; periphyton (Dressler, 2003).
- Cymbella cuspidata Kützing — planktonic, benthic, rare, freshwater
- Cymbella cymbiformis C. A. Agardh – Kindo peninsula; bogs, lakes; Chernaya River, Nilma; periphyton; VIII 2000 (Dressler, 2003: as C. cymbiformis var. cymbiformis Agardh and C. cymbiformis var. nonpunctata Fontell).
Cymbella cymbiformis var. nonpunctata Fontell — periphyton, bogs, lakes (Dressler, Hübener, 2002).
- Cymbella ehrenbergii Kützing — planktonic, benthic, common, freshwater
- Cymbella gracilis (Ehrenberg) Kützing — periphyton, bogs, lakes (Dressler, Hübener, 2002); planktonic, common, Vodoprovodnoye (Potable water) Lake.
- Cymbella helvetica Kützing – freshwater; periphyton (Dressler, 2003).
- Cymbella lanceolata (Ehrenberg) Kirchner – freshwater; periphyton (Dressler, 2003).
- Cymbella leptoceros (Ehrenberg) Kützing – freshwater; periphyton (Dressler, 2003).
- Cymbella naviculiformis (Auerswald) Cleve – freshwater; periphyton (Dressler, 2003).
- Cymbella proxima R.M. Patrick & Reimer – freshwater; periphyton (Dressler, 2003).
- Cymbella subaequalis Grunow – freshwater; periphyton (Dressler, 2003).
- Cymbella tumida (Brébisson) van Heurck — planktonic, benthic, rare, freshwater
- Cymbella turgida W. Gregory – marine, littoral; sporadic, преимущественно in diluted areas (Бондарчук, 1970: C. turgida (Greg.) Cl.).
- Cymbella ventricosa C. Agardh – marine, littoral; sporadic, everywhere (Бондарчук, 1970: as C. ventricosa Ktz.).
Genus Encyonema Kützing
- Encyonema caespitosum Kützing – freshwater; periphyton (Dressler, 2003).
- Encyonema mesianum (Cholnoky) D. G. Mann — periphyton, bogs, lakes (Dressler, Hübener, 2002: as Cymbella mesiana Cholnoky).
- Encyonema minutum (Hilse) D. G. Mann – freshwater; periphyton (Dressler, 2003).
- Encyonema neogracile Krammer – freshwater; periphyton (Dressler, 2003).
- Encyonema neomesianum Krammer – freshwater; periphyton (Dressler, 2003).
- Encyonema silesiacum (Bleisch) D. G. Mann – freshwater; periphyton (Dressler, 2003).
Genus Encyonopsis K. Krammer
- Encyonopsis cesatii (Rabenhorst) Krammer var. cesatii – freshwater; periphyton (Dressler, 2003).
- Encyonopsis descripta (Hustedt) Krammer – freshwater; periphyton (Dressler, 2003).
- Encyonopsis krammeri Reichardt – freshwater; periphyton (Dressler, 2003).
- Encyonopsis microcephala (Grunow) Krammer – freshwater; periphyton (Dressler, 2003).
- Encyonopsis minuta Krammer & E. Reichardt – freshwater; periphyton (Dressler, 2003).
- Encyonopsis subminuta Krammer & E. Reichardt – freshwater; periphyton (Dressler, 2003).
Family Gomphonemataceae Kützing
Genus Didymosphenia M. Schmidt in A. Schmidt
- Didymosphenia geminata (Lyngbye) M.Schmidt in A. Schmidt – freshwater; periphyton (Dressler, 2003).
Genus Gomphonema Ehrenberg
- Gomphonema acuminatum Ehrenberg – marine, littoral; often in diluted areas (Бондарчук, 1970). Freshwater; periphyton (Dressler, 2003).
- Gomphonema angustum (Kützing) Rabenhorst – freshwater; periphyton (Dressler, 2003).
- Gomphonema augur Ehrenberg var. augur – freshwater; periphyton (Dressler, 2003).
- Gomphonema clavatum Ehrenberg – freshwater; periphyton (Dressler, 2003).
- Gomphonema constrictum Ehrenberg — epiphyte on algae, common, marine, brackish-water, freshwater
- Gomphonema gracile Ehrenberg – freshwater; periphyton (Dressler, 2003).
- Gomphonema hebridense W. Gregory – freshwater; periphyton (Dressler, 2003).
- Gomphonema olivaceum (Hornemann) Kützing – marine, littoral; sporadic, everywhere (Бондарчук, 1970: G. olivaceum (Lyngb.) Ktz.).
- Gomphonema parvulum (Kützing) F.H. van Heurck – freshwater; periphyton (Dressler, 2003). Also in in the superficial brackish layer of wind mixing 0–0.5 m in semi-isolated coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023).
- Gomphonema subtile Ehrenberg – freshwater; periphyton (Dressler, 2003).
- Gomphonema truncatum Ehrenberg – freshwater; periphyton (Dressler, 2003).
Family Rhoicospheniaceae Topachevs'kyi & Oksiyuk
Genus Gomphonemopsis L.K. Medlin in L.K. Medlin & F.E. Round
- Gomphonemopsis exigua (Kützing) Medlin – marine, littoral; everywhere; in some areas abundant (Бондарчук, 1970: Gomphonema exiguum Kützing).
Genus Rhoicosphenia Grunow
- Rhoicosphenia abbreviata (C. Agardh) Lange-Bertalot var. abbreviata – marine, littoral; periphyton; everywhere, in some areas масс. (Бондарчук, 1970: as Rh. curvata (Kützing) Grunow ex Rabenhorst; Rh. curvata var. marina (Kützing) Grunow – together with type variation; often). Marine, littoral; benthic (Сабурова, 1995: as Rh. curvata).
- Rhoicosphenia marina (W. Smith) A. Schmidt — planktonic, common, Velikaya Salma (Бондарчук, 1963); epiphyte on marine macrophytes, common, littoral, sublittoral, everywhere
- Rhoicosphenia pullus M.Schmidt – marine, sublittoral; among fouling; rare (Бондарчук, 1970).