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.,
similar to Astasia klebsi but cell body rigid not plastic,
cell body 38 μm long, 6.5 μm wide,
x 640, mud on road by Asami-numa (Azami-numa), Iwajuku, Kasakake town, Gunma Pref., Japan, October 2001 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640