Difflugia ovalisina Chardez & Beyens 1994
Diagnosis: Shell oval, with a circular cross-section. The aperture is truncated at a right angle; the border shows a slight swelling (rim), sometimes slightly re-curved to the interior. The organic cement is transparent with a yellowish tint, encrusted with small flattish pieces, and with a few siliceous elements and diatoms added. Cytoplasm limpid, lobose pseudopodia, spherical nucleus.
Dimensions: Length 25-29 µm, width 18-28 µm; diameter of pseudostome: 9-15 µm; height of rim 1.5-2.2 µm, diameter of nucleus 15 µm (n = 8).
Ecology: Freshwater, Devon Island.
Remarks: This small species resembles Difflugia saxicola Penard, but differs mainly from the latter by aperture which is truncated at a right angle and provided with a slight, mostly re-curved rim.