Cryptodifflugia valida Playfair, 1917
Diagnosis: Shell large, ovoid, circular in transverse section; lateral sides gradually converging towards an aperture; aperture circular and rather broad, there is a well developed thickening around an aperture.
Dimensions: Shell length 55 μm, shell width 40 μm, aperture diameter 15 μm.
Ecology and distribution: Freshwater ponds, bogs. Australia, Chile.
Reference: 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.