 
 
 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400 :
 150 μm; x 400 : 
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
Trachelomonas (Strombomonas) fluviatilis (Lemmermann) Deflandre: Lorica broad spindle-shaped or ellipsoidal, collar cylindrical, surface smooth, 28-38 μm long, 12-17 μm wide, lorica opening slanted (Illustrations of the Fresh-water Algae, 1977).