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Spirotrichea: Heterotrichia: Heterotrichida

Spirostomum sp.
Ehrenberg, 1833

Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985). Undulating membrane absent; lacnur canal from contractile vacuole (Carey, 1992).


Spirostomum minus, cell body μm long, μm wide, x 200, x 400, x 640, Japan, 1998 by Y. Tsukii


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