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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 65 μm long, 52 μm wide, L/W=1.3, long cilia 20 μm long, short body cilia 20 μm long, x 640, a small pond at Tsutsuji-ga-oka park, Tatebayashi city, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Histiobalantium Histiobalantium Histiobalantium
Cell body 52 μm long, 36 μm wide, L/W=1.4, x 640
Histiobalantium Histiobalantium

Images of collecting locality: A small pond at Tsutsuji-ga-oka park, Tatebayashi city, Gunma Pref., Japan, February 18, 2006 by Y. Tsukii

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