Cryptodifflugia globosa Playfair, 1917

Diagnosis: Shell differing from the typical form by its globose to subglobose shape; aperture occupying the entire lower surface.

Dimensions: Shell length 17–20 μm; shell width 15–18 μm.

Ecology: In thickets of Typha in waterbodies.

Distribution: Australia; Poland; Germany; Greenland; Romania; Vietnam; South Georgia; Crozet Island; Possession Island.

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: Cryptodifflugia crenulata var. globosa Playfair, 1917, is changed to Cryptodifflugia globosa Playfair, 1917.
A formal change is not required in this case according to the International Code of Zoological Nomenclature:
(1) According to Article 45.6.3, as the name was published before 1961 using the abbreviation var., it is deemed to be subspecific rather than infra-subspecific and therefore falls under the rulings for species-group nominal taxa (Chapter 10).
(2) According to Article 46.1, names established at either species rank (species or subspecies) are simultaneously established at the other rank, with the same author and the same type. The authority thus remains unchanged.