Difflugia achlora (Penard, 1902) Ogden, 1980
Diagnosis: Test ovoid, lateral sides almost parallel, fragile, covered with a mixture of grains of sand and fragments of diatoms. Pseudostome irregularly three-lobed, the lobes not the same in size and shape.
Dimensions: Length 50-85 µm, width 40-65 µm, pseudostome 14-25 µm.
Ecology: Freshwater. Europe.