Cryptodifflugia compressa australis Playfair, 1917
Diagnosis: Shell compressed, oval, differs from the typical form by shell width slightly exceeding its length, shell surface smooth, without mineral inclusions.
Dimensions: Shell length 16–19 μm, shell width 18–21 μm.
Ecology and distribution: Aquatic plants and wetlands. Australia.
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.