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:

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Posteriorly tapered
A kathemerios ? cell 47 x 8 μm flag. μm Japan, 1998	A kathemerios ? cell 45 x 9 μm flag. μm Japan, 199?	A kathemerios ? cell 44 x 11 μm flag. μm Sugadaira Nagano, 2001	A kathemerios ? cell 38 x 6.5 μm flag. μm Iwajuku Gunma, 2001
A kathemerios ? cell 48 x 10 μm Ushidome-ike Norikura highland Nagano, 2005	A kathemerios ? cell 21 x 7 μm Haneo Namegawa Saitama, 2004

Similar Genus ->> Rhabdomonas; Cyclidiopsis; Chilomonas; Entosiphon

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