Heterotrichea:
Heterotrichida: Spirostomatidae
Spirostomum sp.
Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985).@
Species:
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Spirostomum sp.,
cell body 275 μm long, 31 μm wide, with two spherical macronuclei,
x 400, x 640, Ushiku city, Ibaraki Pref., Japan, April 2002 by Y. Tsukii
Two spherical macronuclei, 15 μm in diam.
50 μm
100 μm
150 μm; x 400
31 μm
63 μm
94 μm; x 640
Peristome about 90 μm long (1/3 of the body length)
50 μm
100 μm
150 μm; x 400
31 μm
63 μm
94 μm; x 640
A flattened cell, x 400, x 640
Two ellipsoidal macronuclei, 25 μm long, 10 μm wide,
x 400, x 640
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
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