Oligohymenophorea:
Hymenostomatia: Scuticociliatida: Pleuronematina: Histiobalantiidae
Histiobalantium natans
(Claparède & lauterborn, 1858)
Syn. H. agile Stokes, 1886; Pleuronema inflatum Lauterborn, 1915?
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:
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Histiobalantium natans (or H. marinum or a similar species),
cell body 48 μm long, 28 μm wide, L/W=1.7,
long cilia μm long, short body cilia μm long,
x 640, Jionji-shinsui-koen (Jion temple water park), Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, February 12, 2006 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Cell body 59 μm long, 49 μm wide, L/W=1.2,
long cilia 18 μm long, short body cilia 10 μm long,
x 640
Images of collecting locality:
Jionji-shinsui-koen (Jion temple water park), Iwatsuki-ku (formerly Iwatsuki city), Saitama city, Saitama Pref., Japan, February 12, 2006 by Y. Tsukii
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).
Please click on images for viewing enlarged.
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