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Oligohymenophorea: Hymenostomatia: Scuticociliatida: Pleuronematina: Histiobalantiidae

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

Histiobalantium 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 marinum or a similar species), cell body μm long, μm wide, x 640, Senjo-ga-hara (marsh), Nikko city, Tochigi Pref., Japan, September 2003 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 natans Histiobalantium natans Histiobalantium natans Histiobalantium natans Histiobalantium natans

Histiobalantium (natans or marinum or a similar species), cell body fattened with coverglass, small trichocysts visible, x 640, Doman-green Park, Nishi-Urawa, Saitama Pref., Japan, February 2003 by Y. Tsukii
Histiobalantium

Histiobalantium natans (Claparède & Lachmann): 70-110 μm long (Kudo, 1966).

Histiobalantium marinum Kahl, 1933: Reniform; oral area large, located centrally; 80 μm long (Carey, 1992).

Histiobalantium semisetatum Noland: Elongate ellipsoid; posterior end bluntly rounded; a single macronucleus spherical; longer cilia (bristles) on posterior half only; contractile vacuole on dorsal side; 126-205 μm long; salt water (Kudo, 1966).

Histiobalantium majus Kahl, 1931: Reniform, with a bluntly pointed posterior; oral area large; many trichocysts; 150 μm long (Carey, 1992).


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