Corythion delamarei  Bonnet & Thomas, 1960

Diagnosis: Shell small, elongated ovoid, little or not compressed, aperture obliquely cut, about 45° relative to the axis of the test. Aperture circular or slightly elliptical, inner border with small teeth. No invaginated tube as in Trinema, but only a weak invagination of the pseudostome, 1 µm high or lower. Shell composed of granules or elliptical scales irregularly distributed and without covering each other partly. These scales are seldom larger than 1 µm.

Dimensions: Bonnet and Thomas (1960): Shell length: 23—27 µm, width 12—15 µm.

Ecology: Soil, in mosses and lichens.

Geographical distribution: Southern-France.