Order Triceratiales

Family Triceratiaceae (Schütt) Lemmermann

Genus Cerataulus C.G. Ehrenberg

• Cerataulus pelagica (Cleve) Hendey — marine, planktonic (Rat'kova, 2000).
• Cerataulus smithii Ralfs ex Pritchard— benthic, common, littoral, Velikaya Salma.
• Cerataulus turgidus (Ehrenberg) Ehrenberg — planktonic, rare, Velikaya Salma.

Genus Odontella C.A. Agardh

• Odontella aurita (Lyngbye) C.A. Agardh (=Biddulphia aurita (Lyngb.) Bréb. & Godey) – marine, littoral; everywhere, in some areas dominant (Бондарчук, 1970). Мор.; planktonic (Конопля, 1974).

Family Plagiogrammataceae De Toni

Genus Plagiogramma Greville

• Plagiogramma staurophorum (Gregory) Heiberg – marine, littoral; everywhere, rare (Бондарчук, 1970).

Bacillariophyceae incertae sedis Genus Cystopleura Brébisson ex O. Kuntze

• Cystopleura turgida (Ehrenberg) Kützing — epiphyte on algae, common, freshwater

Genus Dimerogramma Ralfs

• Dimerogramma minor (Greg.) Ralfs – marine, littoral; silty-sandy soil; benthic; dominant (Сабурова, 1995).

rus: Порядок Triceratiales