Order Fragilariales
Family Fragilariaceae Greville
Genus Asterionella Hassall
- Asterionella formosa Hassall – freshwater; periphyton (Dressler, 2003).
- Asterionella gracillima (Hantzsch) Heiberg — planktonic, common, lakes
- Asterionella glacialis Castracane — marine, planktonic (Rat'kova, 2000).
Genus Catacombаs D. M. Williams & Round
- Catacombаs gaillonii (Bory de Saint-Vincent) D. M. Williams & Round – marine, littoral; single finding (Бондарчук, 1970: Synedra gaillonii (Bory de Saint-Vincent) Ehrenberg).
Genus Ceratoneis Ehrenberg
- Ceratoneis arcus Kützing – marine, littoral, diluted areas; sporadic (Бондарчук, 1970). Marine, mouth area of the Nilma River; planktonic; dominant (Лихачёва, 2003).
C. arcus var. lineari Holmboe – single finding in fouling (Бондарчук, 1970). Genus Ctenophora (A. Grunow) D. M. Williams & Round
- Ctenophora pulchella (Ralfs ex Kützing) D. M. Williams & Round var. pulchella – marine, littoral; benthic, periphyton; rare, everywhere (Бондарчук, 1970: Synedra pulchella Ralfs ex Kützing; S. pulchella var. lanceolata O'Meara – very rare, together with type variation).
Genus Diatoma Bory de Saint-Vincent
- Diatoma elongatum (Lyngbye) C. Agardh – marine, littoral, mouths of brooks; sporadic (Бондарчук, 1970).
- Diatoma hyemalе (Roth) Heiberg – marine, littoral, mouths of brooks; sporadic (Бондарчук, 1970).
- Diatoma tenuе C. A. Agardh – freshwater; periphyton (Dressler, 2003).
- Diatoma vulgare Bory de Saint-Vincent — planktonic,benthic, common, sublittoral, freshwater
Genus Fragilaria Lyngbye
- Fragilaria capucina Desmazières var. capucina – marine, littoral; benthic, periphyton; rare (Бондарчук, 1970). Freshwater; periphyton (Dressler, 2003: F. capucina var. mesolepta Rabenhorst and F. capucina var. vaucheriae (Kützing) Lange-Bertalot).
- Fragilaria cf. capucina var. gracilis (Østrup) Hudsted – freshwater; periphyton (Dressler, 2003).
- Fragilaria construens (Ehrenberg) Grunow – marine, littoral; often in significantly diluted areas (Бондарчук, 1970). Freshwater, Verkhneye (Upper) Lake, Vodoprovodnoye (Potable water) Lake; planktonic (Бизина, 1998). Freshwater; periphyton (Dressler, 2003: as F. construens (Ehrenberg) Hudsted f. construens and F. construens f. venter (Ehrenberg) Grunow).
- Fragilaria crotonensis Kitton – marine, mouth area of the Nilma River; planktonic; dominant (Лихачёва, 2003). Freshwater; periphyton (Dressler, 2003).
- Fragilaria hyalina (Kützing) Grunow ex Van Heurck – marine, littoral; benthic, periphyton; in some areas abundant (Бондарчук, 1970).
- Fragilaria islandica Grunow ex Van Heurck – marine; planktonic (Конопля, 1974). Marine; planktonic; dominant (Возжинская, 1975).
- Fragilaria parasitica var. subconstricta Grunow in Van Heurck – freshwater; periphyton (Dressler, 2003).
- Fragilaria striatula Lyngbye – marine; littoral; in some areas abundant, particularly in fouling of filamentous macrophytes (Бондарчук, 1970).
- Fragilaria сf. tenera (W.Smith) Lange-Bertalot – freshwater; periphyton (Dressler, 2003).
- Fragilaria ulna (Nitzsch) Lange-Bertalot – freshwater; periphyton (Dressler, 2003: as F. ulna var. ulna s.l. and F. ulna var. angustissima).
Genus Fragilariforma D. M. Williams & F. E. Round
- Fragilariforma virescens (Ralfs) D.M. Williams & Round – marine; littoral; benthic, periphyton; everywhere; not abundant (Бондарчук, 1970: as Fragilaria virescens Ralfs).
Genus Hannaea R. Patrick in R. Patrick & C. W. Reimer
- Hannaea arcus (Ehrenberg) Patrick — marine, planktonic (Rat'kova, 2000).
Genus Martyana F. E. Round in F. E. Round et al.
- Martyana atomus (Héribaud-Joseph) Round, 1990 - marine. Found in semi-isolated from the sea coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023).
- Martyana martyi (Héribaud) F.E. Round – marine, littoral; benthic, periphyton; rare, everywhere (Бондарчук, 1970: as Opephora martyi Héribaud).
Genus Meridion C. Agardh
- Meridion circulare (Greville) C. Agardh – marine, littoral; sporadic in mouths of brooks (Бондарчук, 1970).
Genus Opephora P. Petit
- Opephora marina (Gregory) Petit var. marina – marine, littoral; benthic, periphyton; rare, everywhere (Бондарчук, 1970; O. marina var. minuta – together with type variation, but less often). Marine, littoral; benthic (Сабурова, 1995).
Genus Pseudostaurosira D. M. Williams & F. E. Round
- Pseudostaurosira brevistriata (Grunow) D.M. Williams – marine, littoral; diluted areas; benthic, periphyton; often (Бондарчук, 1970: as Fragilaria brevistriata Grunow). Freshwater; periphyton (Dressler, 2003: F. brevistriata).
- Pseudostaurosira cf. elliptica - freshwater. Found in anaerobic zone of semi-isolated coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023).
Genus Staurosirella D. M. Williams & F. E. Round
- Staurosirella pinnata (Ehrenberg) D.M. Williams & Round – freshwater; periphyton (Dressler, 2003: as Fragilaria pinnata Ehrenberg var. рinnata). Also found in anaerobic zone of semi-isolated coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023).
Genus Synedra Ehrenberg
- Synedra camtschatica Grunow var. camtschatica – marine, littoral, sublittoral; periphyton; often (Бондарчук, 1970: S. kamtschatica Grun.; S. camtschatica var. finnmarchica Cleve & Grunow – together with type variation, less often).
- Synedra crystallina (C. Agardh) Kützing – marine, littoral; rare (Бондарчук, 1970).
- Synedra famelica Kützing – marine, littoral, significantly diluted areas; sporadic (Бондарчук, 1970).
- Synedra fulgens (Greville) W. Smith – marine, littoral, sublittoral; periphyton; rare (Бондарчук, 1970).
- Synedra tabulata (C. Agardh) Kützing var. tabulata – marine, littoral, sublittoral; periphyton; everywhere, dominant (Бондарчук, 1970, 1971, 1980б). Marine; planktonic; spring (Конопля, 1971). Marine; planktonic (Конопля, 1974).
S. tabulata var. acuminata Grunow – together with type variation, less often (Бондарчук, 1970). S. tabulata var. affinis Rz. – littoral; rare (Бондарчук, 1970). S. tabulata var. grandis Mereschk. – littoral; in some areas often (Бондарчук, 1970). S. tabulata var. fasciculata (Kützing) Grunow – together with type variation, less often (Бондарчук, 1970). S. tabulata var. obtusa Rant. – together with type variation, rare (Бондарчук, 1970). S. tabulata var. parva (Kützing) Grunow – often, in some areas abundant (Бондарчук, 1970).
- Synedra tenera W. Smith – marine, littoral, significantly diluted areas; rare (Бондарчук, 1970).
- Synedra ulna (Nitzsch) Ehrenberg var. ulna – marine, littoral; rare (Бондарчук, 1970). Marine; mouth area of the Nilma River; planktonic; dominant (Лихачёва, 2003).
S. ulna var. aequalis (Kützing) Hustedt – sporadic (Бондарчук, 1970). S. ulna var. danica (Kützing) Grunov – together with type variation; rare (Бондарчук, 1970). Genus Tabularia (F. T. Kützing) D. M. Williams & F. E. Round
- Tabularia investiens (W. Smith) D. M. Williams & Round – marine, littoral, sublittoral; periphyton; everywhere, not abundant (Бондарчук, 1970: as Synedra investiens W. Smith).
Genus Ulnaria F. T. Kützing
- Ulnaria acus (Kützing) M. Aboal – marine, littoral, diluted areas; sporadic (Бондарчук, 1970: as Synedra acus Kützing).