Order Ectocarpales

Family Acinetosporaceae C. Agardh

Genus Pylaiella Bory de Saint-Vincent

• Pylaiella littoralis (Linnaeus) Kjellman – marine, littoral; on stones, thallome Fucus, Ascophyllum, Chorda (Блинова, 1962). On thallome Fucus serratus (Успенская, 1963). Protected coastal areas; littoral; dominant; poorly protected coastal areas; sublittoral (Возжинская, 1967; 1975).

Family Chordariaceae Greville

Genus Chordaria C. Agardh

• Chordaria flagelliformis (O. F. Müller) C. Agardh – marine, littoral, sublittoral (Блинова, 1962: Ch. flagelliformis f. firma Kjellman, Ch. flagelliformis f. chordaeformis Kjellman and Ch. flagelliformis f. typica Kjellman). Marine; on thallome Polysiphonia stricta (Успенская, 1963). Marine, littoral (basins), sublittoral; poorly protected coastal areas, down to 2 m; open areas, down to 3 m (Возжинская, 1967: Ch. flagelliformis and Ch. flagelliformis f. chordaeformis). Marine, littoral, concomitant form (Возжинская, 1975). (Михайлова, 2010).

Genus Dictyosiphon Greville

• Dictyosiphon chordaria Areschoug – marine, littoral; in pools (Блинова, 1962: D. chordaria Gobi; Михайлова, 2010).
• Dictyosiphon foeniculaceus (Hudson) Greville – marine, littoral; in pools (Блинова, 1962). Littoral, sublittoral; on macrophytes thallom (Успенская, 1963). On thallome of Fucus serratus (Успенская, 1963: D. hippuroides (Lingbye) Kützing). Sublittoral; poorly protected coastal areas (Возжинская, 1967: D. hippuroides; Михайлова, 2010).

Genus Elachista Duby

• Elachista fucicola (Velley) J. E. Areschoug – marine, littoral, sublittoral; on thallome Fucus, Ascophyllum (Блинова, 1962: Elachistea futicola Fries). On thallome of Fucus vesiculosus, Devaleraea ramentacea (Успенская, 1963). (Михайлова, 2010).

Genus Phycocelis Strömfelt

• Phycocelis foecunda Strömfelt – marine; on thallome Cladophora and Rhizoclonium (Сапожников, 1996: Myrionema foecundum (Strömfelt) Sauvageau).

Genus Stictyosiphon Kützing

• Stictyosiphon subarticulatus (Areschoug) Hauck (=Stictyosiphon laxus (J. Agardh) Athanasiadis) – marine, littoral (Алим, 1962; Михайлова, 2010). Littoral; in pools (Блинова, 1962). Littoral; protected coastal areas; dominant; poorly protected areas (Возжинская, 1967). Littoral; concomitant form (Возжинская, 1975). Littoral, enclosed coastal areas; common (Долгачёва, 1975).
• Stictyosiphon tortilis (Gobi) Reinke (=Stictyosiphon tortilis (Rupr.) Reinke) – marine, littoral; concomitant form (Возжинская, 1975; Михайлова, 2010).

Family Ectocarpасеае C. Agardh

Genus Ectocarpus Lyngbye

• Ectocarpus siliculosus (Dillwyn) Lyngbye – marine, sublittoral (Алим, 1962). Sublittoral, on thallome Chorda (Блинова, 1962: E. confervoides Le Jolis). On thallome Devaleraea ramentacea (Успенская, 1963: E. confervoides). Littoral; protected coastal areas; dominant (Возжинская, 1967). (Михайлова, 2010).

Genus Pilinia Kützing

• Pilinia rimosa Kützing – on stones, on Laminaria; littoral, sublittoral; Eremeevsky porog rapids, WSBS settlement; sporadic (own data).

rus:Порядок Ectocarpales