• Euglena viridis var. purpurea : Playfair (1921)
• Euglena viridis var. mucosa: Lemmermann (1910)
• Euglena viridis var. maritima : E.G.Pringsheim (1953)
• Euglena viridis var. lefevrei: M.Chadefaud (1937)
• Euglena viridis var. halophila: E.G.Pringsheim (1953)
• Euglena viridis f. salina: Popova (1947)
• Euglena archaeoviridis: P.L.Walne (1994), B.Zakrys
• Cercaria viridis : O.F.Müller (1786)

Cells spindle-shaped to broadly spindle-shaped, anterior end rounded, posterior end usually tapering to a point of variable length; pellicle faintly spirally striated. Single chloroplasts in the form of numerous long bands arranged in star-like shape, irregular, with paramylon bodies ovoid, ring-like to brick-shaped, a mass of paramylon surrounds central area of the chloroplasts, some generally distributed  disc-shaped located towards posterior end.

Marine species. Cosmopolitan, widespread.

Distribution: as Euglena viridis (O.F.Müller) Ehrenberg

Europe: Baltic Sea (Hällfors 2004), Black Sea (BSPC Editorial Board 2014), Britain (Wolowski 2002, Whitton et al. 2003), France (Anon. 2012), Germany (Scholz & Liebezeit 2012 , Täuscher 2013, Täuscher 2014), Romania (Caraus 2002, Caraus 2012), Spain (Alvárez Cobelas 1984). North America: New Jersey (Shin & Triemer). South America: Argentina (Rodriguez et al. 2006), Brazil (Alves-da-Silva & Menezes 2010). Africa: Sierra Leone (Alfinito 2011). South-west Asia: Israel (Stupina et al. 2000). Asia: China (Hu & Wei 2006). Australia and New Zealand: New South Wales (Day et al. 1995), Northern Territory (Day et al. 1995), Queensland (Day et al. 1995).

as Euglena viridis var. purpurea Playfair

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

as Euglena viridis f. salina Popowa

Europe: Romania (Caraus 2002).

Atlas of Euglenophytes, VEDA, Publishing House of the Slovak Academy of Sciences, Konrad Wolowski, František Hindák, 2005, 136 pp.

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