Heterotrichea:
Heterotrichida: Spirostomatidae
Spirostomum teres
Claparède & Lachmann, 1859
Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985).
Species: 300 μm long;
no expansion or attenuation of the body (?);
peristome 1/2 body length; simple ovoid macronucleus;
(Carey, 1992).
150-400 μm long; with one, oval macronucleus
(How to know the protozoa, 1979).
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Spirostomum teres,
cell body 460 μm long, 54 μm wide,
peristome 144 μm long (1/3 of the body length),
an ellipsoidal macronucleus (slightly irregular in shape),
x 400, x 640, Matsumoto, Nagano Pref., Japan, May 2001, collected by N. Kinoshita, photo by Y. Tsukii
50 μm
100 μm
150 μm; x 400
31 μm
63 μm
94 μm; x 640
Spirostomum teres,
cell body 360 μm long, 40 μm wide,
peristome 130 μm long (about 1/3 of the body length),
an ellipsoidal (or rod-shaped ?) macronucleus, 45 μm long, 20 μm wide,
x 100, x 200, x 400, x 640, Matsumoto, Nagano Pref., Japan, May 2001, collected by N. Kinoshita, photo by Y. Tsukii
200 μm
400 μm
600 μm; x 100
100 μm
200 μm
300 μm; x 200
50 μm
100 μm
150 μm; x 400
31 μm
63 μm
94 μm; x 640
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