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: Cell body cylindroid with posterior end rounded, 45 μm long, 10 μm wide; a flagellum more or less longer than the body length; ovoidal paramylum granules (WPRNO).

Posterior end rounded
A. lagenula ? or A. parvula ? stock Kgy-2, axenic posterior rounded 43 x 9 μm axenic, EM Kagoshima, 2001	A. lagenula ? or A. parvula ? stock Kgy-2, axenic posterior rounded cysts 18 μm φ Kagoshima, 2001	A. lagenula ? or A. parvula ? stock Kgy-2, axenic posterior rounded 37 x 8 μm cysts 18 μm φ Kagoshima, 2001	A. lagenula ? or A. parvula ? stock Kgy-2, axenic posterior rounded cysts 19 μm φ Yaku island Kagoshima, 2001

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