Acanthocystis taurica Mikrjukov, 1997
Diagnosis: Cells with a diameter of 23-30 µm, periplast represented by lamellar scales and spicules of one type. Spicules with a length of 3.0-5.5 µm, with a large basal plate with a diameter of 1.8-2.1 µm. Apices of spicules bear four to six marginal teeth. Lamellar scales elliptical, with a size of 2.8-4.0 X 2.0-2.6 µm with a poorly pronounced axial thickening and small granularity.
Ecology: fresh waters; reported from Ukraine and Russia.