Genus: Emergent flagellum mobile throughout its length during swimming; colourless; no eyespot; cell body rigid; cylindrical, not flattened; canal opening subapical; paramylon and lipid abundant; fresh water (Illustrated Guide, 1985). Body rigid, cylindrical, more or less arched; pellicle longitudinally ridged; a flagellum at apex (Kudo, 1966).

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Posterior rounded
R. incurva cell 20 x 6 μm flag. 23 μm Shitami-Oike Hiroshima, 1998 Movies	R. incurva cell 20 x 7 μm flag. 20 μm Saitama, 1999	R. incurva cell 20 x 7.5 μm flag. 23 μm Koshigaya Saitama, 2001	R. incurva cell 21 x 8 μm flag. 23 μm Tanohara Natural p. Ontake highland Nagano, 2005
R. intermedia cell 22-26 x 8-12 μm flag. μm Japan, 199?	R. intermedia cell 20 x 11 μm near Hyoutan-ike Nasu Tochigi, 2006
Rhabdomonas sp. cell 35 x 17 μm flag. 35 μm Kamino-tanbo Tsugaike highland Nagano, 2006	Rhabdomonas sp. cell 37 x 17 μm flag. 33 μm J Skunk Cabbage m Tsugaike highland Nagano, 2006	Rhabdomonas sp. cell 37 x 15 μm Sensho-ga-hara Shizukuishi Iwate, 2007

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

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