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Oligohymenophorea: Peritrichia: Sessilida: Operculariidae

 Orbopercularia sp.

Orbopercularia Genus: Colonical when mature; macronucleus rounded; some species loricate (Illustrated Guide, 1985). Stalk non-contractile.
Species:

Orbopercularia sp. ?, cell body 55 μm long, 20 μm wide, x 640, Shimo-akaiwa, Matsubushi town, Saitama Pref., Japan, March 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Orbopercularia Orbopercularia Orbopercularia Orbopercularia Orbopercularia

O. ramosa: 140 μm long (How to know the protozoa, 1979).

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