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). |
358 μm
716 μm
1074 μm; x 56
200 μm
400 μm
600 μm; x 100
100 μm
200 μm
300 μm; x 200
Spirostomum ambiguum,
cell body 1160 μm long, 84 μm wide,
peristome 920 μm long (more than 3/4 of the body length),
x 100, x 200, x 400?, Uruguay, November 1999, 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
