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Oligohymenophorea: Hymenostomatia: Scuticociliatida: Pleuronematina: Pleuronematidae

 Pleuronema sp.
Dujardin, 1836

Family: Paoral membrane prominent, may be large and may project stiffly (Carey, 1992).
Genus: Ovoid to ellipsoid; peristome begins at anterior end and extends for 2/3 the body length; a conspicuous membrane at both edges; one to many posterior stiff sensory cilia (Kudo, 1966). Swimming as leaping movement.
Species:

Pleuronema sp. ?, cell body 28 μm long, 14 μm wide, caudal cilium 13 μm long, x 640, Tanohara Natural Park, Ontake highland, Otaki town, Nagano Pref., Japan, June 26, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
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