• Raphidium polymorphum var. spirale: G.S West, West
• Ankistrodesmus pseudomirabilis var. spiralis: Korshikov
• Ankistrodesmus falcatus var. spirilliformis: G.S West
• Ankistrodesmus falcatus var. duplex: Kützing , G.S West
• Ankistrodesmus falcatus var. contortus: Thuret, Playfair
• Ankistrodesmus contortus: Thuret
• Ankistrodesmus angustus: C.Bernard (1908)

Distribution:as Ankistrodesmus falcatus var. contortus (Thuret) Playfair

Australia and New Zealand: New South Wales (Day et al. 1995).

as Ankistrodesmus falcatus var. spirilliformis G.S West

Australia and New Zealand: New South Wales (Day et al. 1995), Tasmania (Day et al. 1995).

as Ankistrodesmus angustus C.Bernard

Asia: China (Hu & Wei 2006).

as Monoraphidium contortum (Thuret) Komárková-Legnerová

Europe: Balearic Islands (Cambra Sánchez, Álvarez Cobelas & Aboal Sanjurjo 1998), Baltic Sea (Hällfors 2004), Black Sea (BSPC Editorial Board 2014), Britain (John & Tsarenko 2002, Whitton et al. 2003), Czech Republic (Stirk et al. 2013 ), Germany (Täuscher 2014), Romania (Caraus 2002, Caraus 2012), Spain (Álvarez Cobelas 1982, Alvárez Cobelas & Gallardo 1986, Aboal 1988b, Aboal 1996, Cambra Sánchez, Álvarez Cobelas & Aboal Sanjurjo 1998, Fanés Treviño, Comas González & Sánchez Castillo 2009, Pérez, Maidana & Comas 2009, Pérez, Comas & Maidana 2010). North America: North Dakota (Fawley et al 2006). Caribbean Islands: Cuba (Comas González & Moreira González 2010). South America: Brazil (Menezes 2010). Asia: China (Cao et al 2005). Australia and New Zealand: New Zealand (Broady et al. 2012).

Das Phytoplankton des Susswassers: Systematik und Biologie 7.T., Halfte. Chlorophyceae (Grunalgen), Ordnung: Chlorococcales / von J. Komarek, B. Fott., Stuttgart : E. Schweizerbart'sche Verlagsbuchhandlung, Huber-Pestalozzi G., 1983, 1044

Checklist of Baltic Sea Phytoplankton Species. Baltic Sea Environment Proceedings No. 95, Helsinki Commission Baltic Marine Environment Protection Commission, Hällfors G., 2004,

Biovolumes and size-classes of phytoplankton in the Baltic Sea, HELCOM Balt.Sea Environ. Proc. No. 106, Olenina I., Hajdu S., Edler L., Andersson A., Wasmund N., Busch S., Göbel J., Gromisz S., Huseby S., Huttunen M., Jaanus A., Kokkonen P., Ledaine I. and Niemkiewicz E., 2006, 1-144