Euplotes spp.

Creeping ciliates

40 – 120 µm
Like Aspidisca, but larger and rarer
ribbed and transparent species, with more cilia bunches than Aspidisca spp. and cilia band in mouth area
colony-forming, rigid stalks without muscle, distinct bulge around mouth area
gently strips stalks of several species

In activated sludge and biofilms:

with good oxygen supply and low sludge load

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