Saccamoeba spec.
Diagnosis: relatively large Saccamoeba. Slender, with morulate uroid, sometimes papillated; large nucleus with central nucleolus; cytoplasma with many small granules, some of them obvious crystals of undefined shape,
Ecology: from the river Kromme Rijn near the town of Utrecht, the Netherlands.
Difflugia brychtai, after Stepanek, 1967 Difflugia brychtai Stepanek, 1967 Diagnosis: Test pyriform. Fundus with a long thick spike located not on the longitudinal axis
Difflugia amphoralis, after Cash and Hopkinson, 1909 Difflugia amphoralis Cash and Hopkinson, 1909 Diagnosis: Test transparent, short-topped, fundus pointed, sometimes with a short outgrowth.
Difflugia achlora, after Penard, 1902 Difflugia achlora (Penard, 1902) Ogden, 1980 Diagnosis: Test ovoid, lateral sides almost parallel, fragile, covered with a mixture of grains