Order Coscinodiscales

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Family Coscinodiscacae Kützing

Genus Coscinodiscus C.G. Ehrenberg

  • Coscinodiscus asteromphalus Ehrenberg – marine, littoral; sporadic (Бондарчук, 1970).
  • Coscinodiscus centralis Ehrenberg – marine, littoral, sublittoral; in fouling; sporadic (Бондарчук, 1970: Coscinodiscus asteromphalus var. centralis Grunow). Marine; planktonic; common in spring (Конопля, 1974). Marine; planktonic (Сёмина, Сергеева, 1983).
  • Coscinodiscus concinnus W. Smith – marine, littoral, sublittoral; sporadic (Бондарчук, 1970). Marine; planktonic; dominant in autumn (Конопля, 1974).
  • Coscinodiscus curvatulus Grunow ex A. Schmidt – marine, littoral; sporadic (Бондарчук, 1970; intraspecific taxa: C. curvatulus var. minor (C. G. Ehrenberg) A. Grunow).
  • Coscinodiscus eccentricus var. decipiens Grunow — planktonic; dominant in spring and in autumn, Velikaya Salma (Бондарчук, 1963: как Thalassiosira decipiens (Grunow) Jørgensen; Житина, 1981: as Thalassiosira decipiens (Grunow) Jørgensen).
  • Coscinodiscus lacustris Grunov — silt, fouling, common, Kislosladkoye (Sour-Sweet) Lake.
  • Coscinodiscus marginatus Ehrenberg — planktonic, sporadic, littoral pool, Malyi Eremeevsky Island
  • Coscinodiscus neoradiatus A. Cleve-Euler – marine; planktonic (Конопля, 1974).
  • Coscinodiscus oculus-iridis (Ehrenberg) Ehrenberg – marine, littoral; in some places not rare (Бондарчук, 1970). Marine; planktonic; dominant in autumn (Конопля, 1974).
  • Coscinodiscus payeri A. Grunow — planktonic, rare, Velikaya Salma.
  • Coscinodiscus perforatus Ehrenberg — planktonic, rare, Velikaya Salma.
  • Coscinodiscus radiatus Ehrenberg — marine, planktonic (Rat'kova, 2000); planktonic, stream, Kislaya inlet.
  • Coscinodiscus rothii (Ehrenberg) Grunow — epiphyte on Zostera, rare, Kislaya inlet
  • Coscinodiscus wailesii Gran & Angst — marine, planktonic (Rat'kova, 2000).

Family Heliopeltaceae

Genus Actinoptychus C. G. Ehrenberg

  • Actinoptychus senarius (Ehrenberg) Ehrenberg — marine, planktonic (Rat'kova, 2000).

Family Hemidiscaceae

Genus Actinocyclus Ehrenberg

  • Actinocyclus octonarius Ehrenberg — marine, planktonic (Rat'kova, 2000).

rus: Порядок Coscinodiscales