Order Bacillariales

Family Bacillariaceae Ehrenberg

Genus Bacillaria J. F. Gmelin

• Bacillaria paxillifer (O.F. Müller) Hendey – marine, littoral; rare (Бондарчук, 1963, 1970: as B. paradoxa J. F. Gmelin). Marine, planktonic (Конопля, 1974: as B. paradoxa; Rat'kova, 2000).
• Bacillaria socialis (Gregory) Ralfs var. socialis – marine, littoral; everywhere, not abundant (Бондарчук, 1970: B. socialis (Greg.) Grun.)
  • B. socialis var. baltica Grunow – marine, littoral; tygether with type variation; rare (Бондарчук, 1970).
  • B. socialis var. kariana Grunow – marine, littoral; sporadic (Бондарчук, 1970).

Genus Cylindrotheca Rabenhorst

• Cylindrotheca closterium (Ehrenberg) Lewin & Reimann – marine, littoral; rare, sometimes abundant amongst macrophytes (Бондарчук, 1970: as Nitzschia closterium W. Smith (N. closterium (Ehr.) W. Sm.)). Marine, planktonic (Конопля, 1974: as N. closterium W. Smith). Marine, littoral; benthic; accidental species. (Сабурова, 1995: as N. closterium). Also in semi-isolated coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023).

Genus Fragilariopsis Hustedt in Schmidt

• Fragilariopsis cylindrus (Grunow) Krieger – marine, planktonic (Конопля, 1974: Fragilaria cylindrus Grunow; Сёмина, Сергеева, 1983).
• Fragilariopsis oceanica (Cleve) Hasle – marine, periphyton; not abundant; dominant in spring (Бондарчук, 1963, 1970: as Fragilaria oceanica Cleve). Marine; planktonic; spring (Конопля, 1971). Marine; planktonic; dominant, dominant in spring (Конопля, 1974: as Fragillaria oceanica). Marine; planktonic (Сёмина, Сергеева, 1983).

Genus Hantzschia Grunow

• Hantzschia amphioxys (Ehrenberg) Grunow – marine, littoral, diluted areas; sporadic (Бондарчук, 1970).
  • H. amphioxys var. vivex (Hantzsch) Grunow – marine, littoral; single finding in Rugozerskaya Bay (Бондарчук, 1970).
• Hantzschia virgata (Roper) Grunow – marine, littoral; sporadic (Бондарчук, 1970). Marine, littoral; benthic; dominant (Сабурова, 1995).

Genus Licmophora C. Agardh

• Licmophora communis (Heiberg) Grunow – marine; periphyton; rare (Бондарчук, 1970).
• Licmophora ehrenbergii (Kützing) Grunow – marine; periphyton; very rare (Бондарчук, 1970). Marine; planktonic, non-planktonic species (Конопля, 1974).
• Licmophora gracilis (Ehrenberg) Grunow var. gracilis – marine; periphyton; rare (Бондарчук, 1970).
  • L. gracilis var. anglica (Kützing) H. Peragallo & M. Peragallo – marine; tygether with type variation; rare (Бондарчук, 1970).
• Licmophora hyalina (Kützing) Grunow – marine, littoral; everywhere, not abundant (Бондарчук, 1970).
• Licmophora juergensii C. Agardh – marine, littoral; periphyton; rare (Бондарчук, 1970).
• Licmophora lynbyei (Kützing) Grunow ex van Heurck – marine, littoral; periphyton (Алим, 1962: as L. abbreviata C. A. Agardh). Marine; periphyton; rare (Бондарчук, 1970: as L. abbreviata).
• Licmophora oedipus (Kützing) Grunow – marine, littoral, sublittoral; periphyton; not rare (Бондарчук, 1970).
• Licmophora paradoxa (Lyngbye) C. A. Agardh – marine, littoral, sublittoral; periphyton; often, dominant (Бондарчук, 1970). Marine, littoral, sublittoral; periphyton (Бондарчук, 1971).
• Licmophora tenuis (Kützing) Grunow – marine, sublittoral; periphyton; very rare (Бондарчук, 1970).

Genus Nitzschia Hassall

• Nitzschia acicularis (Kützing) W. Smith – marine; planktonic (Конопля, 1974).
• Nitzschia amphibia Grunow f. amphibia – freshwater; periphyton (Dressler, 2003).
• Nitzschia angularis W.Smith – marine, littoral, sublittoral; benthic, periphyton; everywhere, dominant (Бондарчук, 1970). Marine, sublittoral; periphyton; dominant (Бондарчук, 1980а).
  • N. angularis var. affinis (Grunow) Grunow – tygether with type variation, in some areas dominant (Бондарчук, 1970).
• Nitzschia angustata (W.Smith) Grunow – freshwater; periphyton (Dressler, 2003).
• Nitzschia bilobata W. Smith – marine, littoral; everywhere, not abundant (Бондарчук, 1970: N. biloba W. Sm.).
• Nitzschia constricta (Kützing) Ralfs – marine, littoral, diluted areas; sporadic (Бондарчук, 1970: N. apiculata (W. Gregory) Grunow and N. constricta (Gregory) Grunow). Marine, littoral; benthic; dominant (Сабурова, 1995: N. apiculata).
• Nitzschia dissipata (Kützing) Grunow – marine, littoral, diluted areas; sporadic (Бондарчук, 1970).
• Nitzschia distans W. Gregory – marine, littoral; benthic, periphyton; rare (Бондарчук, 1970).
• Nitzschia fonticola (Grunow) Grunow – marine, littoral, diluted areas; benthic, periphyton; not rare (Бондарчук, 1970). In the plankton of meromictic lake Trekhtzvetnoe (Mindolina, 2025; Ivanova, 2025, personal communication).
  • N. fonticola var. romana (Grun.) A. Cl. – not rare, together with species (Бондарчук, 1970). In the plankton of meromictic lake Trekhtzvetnoe (Mindolina, 2025).
• Nitzschia fonticoloides Sovereign – freshwater; in the plankton of meromictic lake Trekhtzvetnoe (Mindolina, 2025).
• Nitzschia frigida Grunow – marine; planktonic; dominant in spring (Конопля, 1971). Marine; planktonic; dominant, common in spring (Конопля, 1974). Marine; planktonic; beginning of May (Сёмина, Сергеева, 1983).
• Nitzschia frustulum (Kützing) Grunow – marine, littoral; periphyton; sporadic (Бондарчук, 1970).
• Nitzschia gracilis Hantzsch – marine, littoral, diluted areas; sporadic (Бондарчук, 1970). Marine, littoral; benthic; dominant (Сабурова, 1995).
  • N. gracilis var. brevior Grun. – everywhere, sporadic (Бондарчук, 1970).
• Nitzschia hybrida Grunow – marine, littoral; benthic, periphyton; everywhere (Бондарчук, 1970). Marine, littoral; benthic (Сабурова, 1995).
• Nitzschia cf. incognita Legler & Krasske - brackish.; plankt. in meromictic lake Trekhtzvetnoe (Mindolina, 2025).
• Nitzschia intermedia Hantzsch – freshwater, periphyton (Dressler, 2003).
• Nitzschia insignis Gregory – marine, littoral, Rugozerskaya Bay; sporadic (Бондарчук, 1970).
  • N. insignis var. arctica Grun. – sporadic finding (Бондарчук, 1970).
• Nitzschia kuetzingiana Hilse – marine, littoral, diluted areas; benthic, periphyton; rare (Бондарчук, 1970).
• Nitzschia lanceolata W. Smith – marine, littoral; rare (Бондарчук, 1970).
  • N. lanceolata var. minima Van Heurck – marine, littoral; rare (Бондарчук, 1970).
• Nitzschia levidensis (W. Smith) Grunow — marine, littoral (Сапожников, 1998).
• Nitzschia longissima (Brébisson in Kützing) Ralfs – marine, littoral, Rugozerskaya Bay; sporadic (Бондарчук, 1970). Marine; planktonic (Конопля, 1974).
• Nitzschia lorenziana Grunow var. subtilis Grunow – marine, littoral; rare, not abundant (Бондарчук, 1970).
• Nitzschia microcephala Grunow, 1878 - marine. Found in semi-isolated coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023); in plankt. of meromictic lake Trekhtzvetnoe (Mindolina, 2025).
• Nitzschia mitcheliana Greenleaf – marine, littoral; sporadic (Бондарчук, 1970). Marine, littoral; benthic (Сабурова, 1995).
• Nitzschia obtusa W. Smith – marine, littoral, Rugozerskaya Bay; sporadic (Бондарчук, 1970). Marine, area near the mouth of the Nilma River; planktonic; dominant (Лихачёва, 2003).
• Nitzschia palea (Kützing) W. Smith var. capitata Wislouch & Poretzky — marine, littoral (Сапожников, 1998).
• Nitzschia paleacea - freshwater. Found in semi-isolated coastal stratified lake Kislo-Sladkoe, at the depth of 0 to 2–2.5 m (Mindolina et al., 2023).
• Nitzschia panduriformis var. minor W. Gregory — marine, common, littoral (Сапожников, 1998).
• Nitzschia polaris Grunow ex Cleve — marine, littoral (Сапожников, 1998).
• Nitzschia recta Hantzsch — periphyton, bogs, lakes (Dressler, Hübener, 2002).
• Nitzschia cf. perminutum (Grunow) M. Peragallo – freshwater; periphyton (Dressler, 2003).
• Nitzschia punctata (W. Smith) Grunow – marine, littoral; sporadic, everywhere (Бондарчук, 1970). Marine, littoral; benthic (Сабурова, 1995).
  • N. punctata var. coarctata (Grunow) Hustedt – sporadic, tygether with type variation (Бондарчук, 1970).
  • N. punctata var. curta Grunow – sporadic, in diluted areas on the littoral (Бондарчук, 1970).
• Nitzschia recta Hantzsch – freshwater; periphyton (Dressler, 2003).
• Nitzschia sigma (Kützing) W. Smith – marine, littoral; among thallome macrophytes; common, everywhere (Бондарчук, 1970). Freshwater, Verkhneye (Upper) Lake, Vodoprovodnoye (Potable water) Lake; planktonic (Бизина, 1998). Also in semi-isolated coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023).
• Nitzschia sigmoidea (Ehrenberg) W. Smith – marine, littoral; rare, everywhere (Бондарчук, 1970).
• Nitzschia subtilis Grunow – marine, littoral; benthic (Сабурова, 1995).
• Nitzschia tenuirostris Mer. — planktonic, Velikaya Salma (Житина, 1981).
• Nitzschia thermalis Kützing – marine, littoral, diluted areas; rare (Бондарчук, 1970).
• Nitzschia tryblionella Hantzsch – marine, littoral, Rugozerskaya Bay; sporadic (Бондарчук, 1970).
  • N. tryblionella var. levidensis (W. Smith) Grunov – sporadic, tygether with type variation (Бондарчук, 1970).
• Nitzschia vermicularis (Kützing) Hantzsch – marine, diluted areas; abundant (Бондарчук, 1970: N. vermicularis (Ktz.) Grun.).
• Nitzschia vitrea G. Norman – marine, littoral, Rugozerskaya Bay; sporadic (Бондарчук, 1970).
  • N. vitrea var. finmarchica Grun. – sporadic, tygether with type variation (Бондарчук, 1970).
  • N. vitrea var. salinarum Grunow – in diluted areas on the littoral (Бондарчук, 1970).

Genus Psammodictyon D. G. Mann in R. E. Round et al.

• Psammodictyon panduriforme (W. Gregory) D. G. Mann – marine, littoral; everywhere, not abundant (Бондарчук, 1970: as Nitzschia panduriformis W. Gregory; N. panduriformis var. delicatula Grunow – sporadic, littoral Rugozerskaya Bay; N. panduriformis var. minor W. Gregory – sporadic, tygether with type variation).

Genus Pseudo-nitzschia H. Peragallo in H. Peragallo & M. Peragallo

• Pseudo-nitzschia delicatissima (Cleve) Heiden – marine; planktonic; dominant (Конопля, 1971: Nitzschia delicatissima Cleve). Marine; planktonic; dominant, typical in autumn (Конопля, 1974: N. delicatissima).
• Pseudo-nitzschia seriata (Cleve) H. Peragallo – marine; planktonic; dominant in spring (Конопля, 1971: Nitzschia seriata Cleve). Marine; planktonic (Конопля, 1974; Сёмина, Сергеева, 1983: N. seriata).

Genus Tryblionella W. Smith

• Tryblionella acuminata W. Smith – marine, littoral; everywhere, rare (Бондарчук, 1970: as Nitzschia acuminata (W. Smith) Grunow).
• Tryblionella hungarica (Grunow) Frenguelli – marine, littoral; sporadic, everywhere (Бондарчук, 1970: as Nitzschia hungarica Grunow).
• Tryblionella marginulata (Grunow) D.G. Mann – marine, littoral; everywhere, rare (Бондарчук, 1970: as Nitzschia marginatula Grun.; N. marginatula f. minuta Grunow – tygether with type variation). Marine; planktonic (Конопля, 1974: as Nitzschia marginulata Grunow).

rus: Порядок Bacillariales