Spirotaenia endospira W.Archer (1864: 15) (Fig. 15)

Cells 2.3–4 times longer than broad, straight or very slightly curved, oblong-cylindrical with broadly rounded poles, chloroplast a parietal ribbon making 1–2.5 turns. Cell dimensions: length 7–18 μm, breadth 3–4.5 μm.

Geographic distribution:

Europe: Austria, Britain, Czech Republic, France, Germany, Ireland, Latvia, Romania, Slovakia, Ukraine, United Kingdom (Guiry & Guiry 2023); North America: USA (Guiry & Guiry 2023); Asia: South Korea (Guiry & Guiry 2023); South America: Brazil (Ramos et al. 2017).

Ecology: plankton, metaphyton; puddles, bromeliad phytotelmata