Heterotrichea:
Heterotrichida: Spirostomatidae
Spirostomum filum
(Ehrenberg, 1838) Claparède and Lachmann, 1858
Syn. Uroleptus filum Ehrenberg, 1838
Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985).
Species: 200-300 up to 700 μm long;
peristome 1/4 the body length; macronucleus oval; posterior end drawn out (Kudo, 1966).
700 μm long; tail region attenuated;
peristome less than 1/4 the body length; macronucleus single and ovoid (Carey, 1992).
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Spirostomum filum (Ehrenberg) Claparède and Lachmann,
cell body 330 μm long, 18 μm wide, L/W=18.3,
x 200, x 400, No.1, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, June 4, 2007 by Y. Tsukii
200 μm
400 μm
600 μm; x 100
Images of collecting locality:
No.1, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, June 4, 2007 by Y. Tsukii
Please click on images for viewing enlarged.
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