Family: Peristomal disc lacks stalk; body on aboral stalk; if stalkless, in lorica; solitary (Illustrated Guide, 1985).
Genus: Similar to Epistylis; but solitary with a non-contractile stalk; numerous species (Kudo, 1966). Attached to Cyclops, Cypris, other copepods in fresh water (How to know the protozoa, 1979).

->> Description at WPRNO

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R. ovum 50 x 24 μm Kosugi Toyama, 2002	R. ovum 44 x 25 μm Japan, 1998	R. ovum 35 x 19 μm Saitama, 1999	R. ovum a dividing cell Saitama, 1999
R. ovum 24 x 16 μm Japan, 1999	R. ovum 31 x 20 μm Saitama, 1999	R. ovum 27 x 21 μm O-ike w.p. Kasukabe Saitama, 2004	R. ovum 30 x 18 μm Yanome-dam park Nasu Tochigi, 2004
R. ovum 50 x 28 μm Izumo Shrine Izumo Shimane, 2006	R. ovum 27 x 17 μm Fujimi-hotaru s.p. Okegawa Saitama, 2006
Rhabdostyla sp.2 56 x 20 μm Japan, 1998	R. conipes 40 x 21 μm Saitama, 1999	Rhabdostyla sp. 35 x 21 μm Oura central p. Oura Gunma, 2006	Rhabdostyla sp. ? 63 μm Nishi-Urawa Saitama, 2001

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