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. crenulata Playfair, 1917 Fig 4 a Difflugiella crenulata in Grospietsch, 1964 ; Difflugiella crenulata in Schönborn, 1965 Original description. Playfair 1917 , P. 657, Table 38, Fig. 17. Description. Shell small, ovoid sometimes pyriform with more or less distinct neck, circular in transverse section, crenulate, shell surface smooth, chitinous, hyaline or pale yellow, aperture circular, slightly smaller than the fundus. Measurements. Shell length 15–20 µm, shell width 10–16 µm, aperture diameter 4 µm. Habitat. Submerged freshwater plants, mosses and algae, Sphagnum mosses. Geographical distribution. Cosmopolitan.