A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species Author Bobrov, Anatoly Author Mazei, Yuri text Zootaxa 2017 4282 2 292 308 journal article 28745 10.11646/zootaxa.4282.2.4 8265bc1a-8903-47d1-a59d-218d749895e5 1175-5326 818668 CB1CD0B8-797B-4F2D-B100-C12E20AA092E C. sacculus sakotschawi Tarnogradsky, 1959 Figs 7 b, 7c Original description. Tarnogradsky 1959 , P. 50, Table 8, Figs 64 a–e. Description. Shell is pyriform with a shorter neck comparing with typical form; covered by sand grains; completely circular at transverse section; the aperture is circular. Measurements. Shell length 27–30 µm, shell width 18–20 µm, aperture diameter 10.5–13.0 µm. Habitat. Sphagnum lakes. Geographic distribution. Russia (Caucasus).