Trinema nassa Decloitre, 1965
Diagnosis: Test just as other Trinema species with similar arrangement of the plates, but the inner border of the pseudostome is ornamented with small plates each with a short spine that points to the centre of the aperture. Spines about 1.5 µm long. Test compressed.
Dimensions: length 50-55 µm; width 25-30 µm; aperture 10-12 µm.
Ecology: Freshwater, Congo, Mbila, Africa
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