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Oligohymenophorea: Hymenostomatia: Scuticociliatida: Pleuronematina: Histiobalantiidae

 Histiobalantium natans
(Claparède & lauterborn, 1858)
Syn. H. agile Stokes, 1886; Pleuronema inflatum Lauterborn, 1915?

Histiobalantium natans Genus: Ovoid; ciliation uniform; long stiff cilia (bristles) distributed over the body surface; peristome deep, both anterior and posterior regions with a well-developed membranes connected with undulating membrane (velum); two macronucleus; 1-2 micronuclei; several contractile vacuoles; fresh water (Kudo, 1966).
Species:

Histiobalantium natans (or H. marinum or a similar species), cell body 92 μm long, 55 μm wide, L/W=1.7, long cilia 20 μm long, short cilia 9 μm wide, x 400, x 640, Tonbo-no-numa (Dragonfly pond, Takada-seki), Takadani, Isumi city, Chiba Pref., Japan, December 16, 2007 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Histiobalantium Histiobalantium Histiobalantium Histiobalantium Histiobalantium

Images of collecting locality: Tonbo-no-numa (Dragonfly pond, Takada-seki), Takadani, Isumi city, Chiba Pref., Japan, December 16, 2007 by Y. Tsukii

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