black and white portrait

Description:

Anisonema (a nice-owe-knee-ma) trepidum Larsen, 1987. Cells are oblong, 13 to 19 microns long, 6.5 to 10 microns wide, flattened with a chisel-shaped ingestion organelle, which is difficult to observe. There are three distinct grooves on the dorsal and ventral faces of the cell. Two emergent flagella are of unequal length. The anterior flagellum is approximately 1.5 times the cell length, and the trailing posterior flagellum is stronger than the anterior flagellum, is approximately 3.5 to 5 times cell length and tapers distally. The flagellar pocket and nucleus are in the left side of the cell. The cells contained small granules. The cells glide quickly in straight lines and jerk when changing direction. Rarely observed.