Heterotrichea:
Heterotrichida: Spirostomatidae
Spirostomum intermedium
Kahl, 1930-5
Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985).
Species: 400-600 μm;
macronucleus moniliform (Kudo, 1966).
600 μm long (without expansion or attenuation);
peristome 1/2 body length; macronucleus moniliform;
size and the length of the peristome separate this species from S. ambiguum
(1-3 mm long, peristome 2/3 the body length) (Carey, 1992).
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Spirostomum intermedium small variety ?,
cell body 560 μm long, 30 μm wide, L/W=18.7,
x 100, x 200, Nidanuma (Nitanuma), Tsuchiyu-onsen, Fukushima city, Fukushima Pref., Japan, October 28, 2005 by Y. Tsukii
200 μm
400 μm
600 μm; x 100
Cell body μm long, μm wide, L/W=, x 200, x 400, x 640
Spirostomum intermedium ?,
cell body 760 μm long, 24 μm wide, L/W=31.7,
x 100, x 200, x 400, Nidanuma (Nitanuma), Tsuchiyu-onsen, Fukushima city, Fukushima Pref., Japan, October 28, 2005 by Y. Tsukii
200 μm
400 μm
600 μm; x 100
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