Cryptodifflugia leachi  Nicholls, 2006

Diagnosis: Shell oval elliptical, circular in transverse section, with smooth surface and very small aperture.

Dimensions: Shell length 10–16 μm, shell width 8–12 μm, aperture diameter 1.5–2.5 μm.

Ecology: Aquatic species living in bottom sediments.

Distribution: Canada.

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.