Cryptodifflugia australis   Playfair, 1917 *)
Basionym: Cryptodifflugia compressa var. australis   Playfair, 1917

Diagnosis: Shell compressed, oval; differing from the typical form by having a shell width slightly exceeding its length. Shell surface smooth, lacking mineral inclusions.

Dimensions: Shell length 16–19 μm; shell width 18–21 μm.

Ecology: On aquatic plants and in wetlands.

Distribution: Australia.

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.

*) Taxonomic Note: Playfair, 1917, described Cryptodifflugia compressa var. australis. Under Article 45.6 of the International Code of Zoological Nomenclature (ICZN), a name published before 1961 as a “variety” is deemed to be subspecific unless explicitly indicated otherwise. The name is therefore available from 1917 as Cryptodifflugia australis Playfair, 1917.