Drawing

Description:

Hemistasia phaeocysticola (Scherffel, 1900) Elbrachter et al., 1996. Cell outline is pyriform to oblong. Cells are about 13 to 33 microns long, metabolic, with a flexible apical papillum and with an indistinct spiral groove. Two flagella insert subapically in a pocket, are unequal in length and wrap around the body during feeding. The posterior flagellum is slightly longer than the anterior flagellum and the cell. During swimming cells rotate. The cells often contain one large food vacuole in the posterior part of the cell.