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Heterotrichea: Heterotrichida: Spirostomatidae

Spirostomum ambiguum
Ehrenberg, 1838
Syn. Spirostomum minutus Roux, 1901

Spirostomum ambiguum Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985).
Species: 1-3 mm long (without expansion or attenuation); peristome 2/3 body length; macronucleus moniliform; size and the length of the peristome separate this species from S. intermedium (600 μm long , peristome1/2 the body length) (Carey, 1992).


Spirostomum ambiguum, cell body 450 μm long, 70 μm wide, peristome 310 μm long (2/3 of the body length), macronuclei moniliform, x 100, x 200, x 400, x 640, Kanayama green park, Kiyose city, Tokyo, Japan, August 2001 by Y. Tsukii
scale 200 μm scale 400 μm scale 600 μm; x 100 : scale 100 μm scale 200 μm scale 300 μm; x 200
Spirostomum ambiguum Spirostomum ambiguum Spirostomum ambiguum
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Spirostomum ambiguum Spirostomum ambiguum Spirostomum ambiguum Spirostomum ambiguum Spirostomum ambiguum

Spirostomum ambiguum, cell body slightly contracted, 420 μm long, 34, 56 μm wide, peristome μm long (? of the body length), macronuclei moniliform, x 100, x 200, x 400, x 640, Kanayama green park, Kiyose city, Tokyo, Japan, August 2001 by Y. Tsukii
scale 200 μm scale 400 μm scale 600 μm; x 100 : scale 100 μm scale 200 μm scale 300 μm; x 200
Spirostomum ambiguum Spirostomum ambiguum
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Spirostomum ambiguum Spirostomum ambiguum Spirostomum ambiguum


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