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 45 μm long, 9 μm wide,
x 400, Japan, 199? by Y. Tsukii
50 μm
100 μm
150 μm; x 400