Cryptodifflugia sacculus var. sakotschawi   Tarnogradsky, 1959
Difflugiella sacculus var. sakotschawi Golemansky, 1970

Diagnosis: Shell is pyriform with a shorter neck comparing with typical form; covered by sand grains; completely circular at transverse section; the aperture is circular.

Dimensions: Shell length 27–30 μm, shell width 18–20 μm, aperture diameter 10.5–13.0 μm.

Ecology and distribution. Sphagnum lakes. Russia (Caucasus).

References: Bobrov, A., Mazei, Y., 2017. A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species. Zootaxa 4282 (2): 292–308.