Difflugia ovalisina
Difflugia ovalisina, from Chardez & Beyens 1994

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.

Reference:

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