Spirotrichea: Heterotrichia: Heterotrichida

Ehrenberg, 1838

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).

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