Order Achnanthales

Family Achnanthaceae Kützing

Genus Achnanthes Bory

• Achnanthes arctica (Cleve) Cleve-Euler – marine, littoral; sporadic (Бондарчук, 1970).
• Achnanthes affinis Grunow – marine; area near the mouth of the Nilma river; planktonic; dominant. (Лихачёва, 2003).
• Achnanthes altaica Poretzky — marine, littoral (Сапожников, 1998: as Amphora altaica Poretzky).
• Achnanthes atacamae Hustedt — marine, littoral, common (Сапожников, 1998).
• Achnanthes bahusiensis (Grunow) Lange-Bertalot — marine, littoral (Сапожников, 1998: as Achnanthes pseudosolea Simonsen).
• Achnanthes borealis A. Cleve — marine, littoral (Сапожников, 1998).
• Achnanthes brevipes C. Agardh var. brevipes – marine, littoral, diluted areas; benthic, periphyton; sporadic (Бондарчук, 1970). Littoral; benthic (Сабурова, 1995).

A. brevipes var. angustata (Greville) Cleve – marine, littoral, diluted areas; sporadic (Бондарчук, 1970). A. brevipes var. intermedia (Kützing) Cleve – marine, littoral, sublittoral; not rare, in some areas abundant (Бондарчук, 1970).

• Achnanthes calcar (Cleve) Cleve — marine, littoral, dominant (Сапожников, 1998).
• Achnanthes clevei Grunow — marine, littoral, (Сапожников, 1998).
• Achnanthes delicatula (Kützing) Grunow var. delicatula – marine, littoral; rare, sometimes dominant on diluted areas (Бондарчук, 1970).

A. delicatula var. wislouchii Poretzky – marine, littoral; benthic; dominant. (Сабурова, 1995).

• Achnanthes dispar Cleve var. dispar — marine, littoral, (Сапожников, 1998).

Achnanthes dispar var. angustissima Jasnitsky — marine, littoral, (Сапожников, 1998). Achnanthes dispar var. capitata Jasnitsky — marine, littoral, (Сапожников, 1998).

• Achnanthes exigua Grunow var. exigua – freshwater; periphyton (Dressler, 2003).
• Achnanthes groenlandica (Cleve) Grunow – marine, sublittoral; periphyton; not abundant (Бондарчук, 1970).
• Achnanthes holsatica Hustedt – freshwater; periphyton (Dressler, 2003).
• Achnanthes imperfecta Schimanski — marine, common, littoral, (Сапожников, 1998: as Navicula poconoensis A-G. C.).
• Achnanthes inflata (Kützing) Grunow — planktonic, sporadic, Velikaya Salma (Бондарчук, 1963).
• Achnanthes lacus-baicali Skvortzov — marine, littoral, (Сапожников, 1998).
• Achnanthes laevis Østrup — periphyton, bogs, lakes, Kindo peninsula (Dressler, Hübener, 2002).
• Achnanthes lanceolata (Brébisson ex Kützing) Grunow — epiphyte on Hydrurus foetidus, sporadic, brook from the Kindo peninsula watershed.
• Achnanthes cf. lemmermannii Hustedt – freshwater; periphyton (Dressler, 2003).
• Achnanthes parvula Kützing – marine, littoral, sublittoral; not rare, in some areas abundant (Бондарчук, 1970: A. brevipes var. parvula (Kützing) Cleve).
• Achnanthes levanderi Hustedt — marine, littoral (Сапожников, 1998).
• Achnanthes longipes C. Agardh — marine, littoral (Сапожников, 1998).
• Achnanthes microcephala (Kützing) Grunow — epiphyte on filamentous algae, streams, Verkhneye (Upper) Lake, Vodoprovodnoye (Potable water) Lake.
• Achnanthes oestrupii var. minuta Skvortsov — marine, littoral (Сапожников, 1998).
• Achnanthes peragalli Brun & Héribaud – freshwater; periphyton (Dressler, 2003).
• Achnanthes pseudoswazi J. R. Carter – freshwater; periphyton (Dressler, 2003).
• Achnanthes rosenstockii Lange-Bertalot – freshwater; periphyton (Dressler, 2003).
• Achnanthes septata Cleve-Euler – marine, littoral; rare (Бондарчук, 1970).
• Achnanthes subatomoides (Hustedt) Lange-Bertalot & Archibald – freshwater; periphyton (Dressler, 2003).
• Achnanthes submarina Hustedt — marine, littoral (Сапожников, 1998).
• Achnanthes taeniata Grunow — marine, planktonic (Rat'kova, 2000).
• Achnanthes thermalis (Rabenhorst) Schoenfeld — marine, littoral (Сапожников, 1998).

Genus Eucocconeis P.T. Cleve ex F. Meister

• Eucocconeis flexella (Kützing) Meister – freshwater; periphyton (Dressler, 2003).
• Eucocconeis laevis (Østrup) H. Lange-Bertalot – freshwater; periphyton (Dressler, 2003).

Genus Planothidium F.E. Round & L. Bukhtiyarova

• Planothidium conspicuum (A. Mayer) M. Aboal – marine, littoral; benthic; dominant. (Сабурова, 1995: as Achnanthes pinnata Hustedt). Freshwater; periphyton (Dressler, 2003: as Achnanthes conspicua Mayer).
• Planothidium lanceolatum (Brébisson ex Kützing) F. E. Round & L. Bukhtiyarova – marine, littoral; diluted areas; in some areas not rare (Бондарчук, 1970: as Achnanthes lanceolata (Brébisson ex Kützing) Grunow; A. lanceolata var. elliptica Cleve – in mouths of brooks, rare). Freshwater, Verkhneye (Upper) Lake, Vodoprovodnoye (Potable water) Lake; planktonic (Бизина, 1998: as A. lanceolata).

Family Achnanthidiaceae D. G. Mann in F. E. Round et al.

Genus Achnanthidium Kützing

• Achnanthidium minutissimum(Kützing) Czarnecki – freshwater; periphyton (Dressler, 2003: A. minutissima Kützing).

Genus Rossithidium F. E. Round & L. Bukhtiyarova

• Rossithidium petersenii (Hustedt) Round & Bukhtiyarova ex Aboal – freshwater; periphyton (Dressler, 2003: as Achnanthes petersenii Hustedt).
• Rossithidium pusillum (Grunow) Round & L. Bukhtiyarova – freshwater; periphyton (Dressler, 2003: Achnanthes pusilla Grunow).

Family Cocconeidaceae Kützing

Genus Cocconeis C.G. Ehrenberg

• Cocconeis californica Grunow – marine, sublittoral; benthic, periphyton; rare (Бондарчук, 1970).
• Cocconeis clandestina A. Schmidt — fouling of macrophytes, littoral
• Cocconeis costata Gregory – marine, littoral, sublittoral; dominant (Бондарчук, 1970). Marine, littoral, sublittoral; periphyton; dominant (Бондарчук, 1971). Marine, littoral; benthic (Сабурова, 1995). Marine, littoral, sublittoral; periphyton (Сапожников, 1996).
• Cocconeis decipien P. T. Cleve – marine, littoral; rare (Бондарчук, 1970).
• Cocconeis dirupta Gregory – marine, littoral; rare (Бондарчук, 1970).
• Cocconeis disculus (Schumann) Cleve — on green filamentous algae, streams, Vodoprovodnoye (Potable water) Lake.
• Cocconeis notata Petit – marine, littoral, Rugozerskaya Bay; rare (Бондарчук, 1970).
• Cocconeis pediculus Ehrenberg f. pediculus – marine, littoral; rare, everywhere (Бондарчук, 1970).

C. pediculus f. abruptus O. S. Korotkevich – marine, littoral; very rare, together with the type form (Бондарчук, 1970).

• Cocconeis placentula Ehrenberg var. placentula – marine, littoral; rare (Бондарчук, 1970). Freshwater, Verkhneye (Upper) Lake, Vodoprovodnoye (Potable water) Lake; planktonic (Бизина, 1998). Freshwater; periphyton (Dressler, 2003: C. placentula var. lineata (Ehrenberg) P. Cleve and C. placentula Ehrenberg var. placentula).

C. placentula var. euglypta (Ehrenberg) Cleve – marine, littoral; very rare together with the type variation (Бондарчук, 1970). Also in semi-isolated coastal stratified lake Kislo-Sladkoe (Mindolina et al., 2023).

• Cocconeis pseudomarginata Gregory – marine, littoral; sporadic (Бондарчук, 1970).
• Cocconeis quarnerensis (Grunow) A. Schmidt – marine, littoral, Rugozerskaya Bay; sporadic (Бондарчук, 1970).
• Cocconeis scutellum Ehrenberg var. scutellum – marine, littoral; periphyton; dominant, everywhere (Бондарчук, 1970). Marine; planktonic (Конопля, 1974). Marine, littoral; benthic; dominant. (Сабурова, 1995). Marine, littoral; periphyton; dominant (Сапожников, 1996: C. scutellum var. parva (Grunow) Cleve and C. scutellum var. stauroneiformis W. Smith). Freshwater; periphyton (Dressler, 2003: C. scutellum var. scutellum Ehrenberg).

C. scutellum var. minutissima Grunow – marine, littoral; together with the type variation, sometimes abundant (Бондарчук, 1970). C. scutellum var. parva (Grunow) Cleve – marine, littoral; not rare, together with the type variation (Бондарчук, 1970). C. scutellum var. stauroneiformis W. Smith – marine, littoral; everywhere, in some areas abundant (Бондарчук, 1970).

• Cocconeis vitrea J.-J. Brun var. vitrea – marine, littoral; benthic, periphyton; rare (Бондарчук, 1970).

C. vitrea var. verrucosa (J.-J. Brun) P.T. Cleve – marine, littoral; together with the type variation (Бондарчук, 1970).

rus: Порядок Achnanthales