Genus:
Only 1 flagellum emergent from canal, colourless; eyespot absent;
cell body fusiform or elongated, plastic, with pronounced euglenoid movement;
many species, mostly freshwater (Illustrated Guide, 1985).
Species:
Astasia sp.1,
similar to Astasia klebsi but cell body rigid not plastic,
cell body 44 μm long, 11 μm wide,
x 400, x 640, Sugadaira, Nagano Pref., Japan, July 2001 collected by N. Kinoshita, photo by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640