Philodina Spp., Colurella Spp., Lepadella Spp., Lecane Spp., Monostyla Spp., and Scaridium Spp. are indicator microorganisms in activated sludge that can purify wastewater.
代田昭彥（1982）
About the observation record of rotifer.
Philodina Spp., Colurella Spp., Lepadella Spp., Lecane Spp., Monostyla Spp., and Scaridium Spp. are indicator microorganisms in activated sludge that can purify wastewater.