Spirostomum

Spirotrichea: Heterotrichia: Heterotrichida

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


Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985).
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, x 56?, x 100, x 200, Uruguay Nov. 1999, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640

Spirostomum ambiguum, x 100, x 200, x 400?, Uruguay Nov. 1999, photo by Yuuji Tsukii


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