Genus Corythion Taranek, 1918

Diagnosis: Shell ovoid, asymmetrically compressed; lenticular in cross-section, lateral margins often slightly acute; aperture invaginated, oblique, oval, semicircular or round; anterior part resembling a spoon. Test composed of one type of body plates: circular, rectangular, imbricated, irregularly distributed but at lateral margins in rows. Apertural plates with one central tooth. Some species with a terminal horn or decorated with short spines. Nucleus vesicular.

Ecology: Feeding on bacteria. In mosses, sphagnum and in soils.

References: Roland, T.P., Amesbury, M.J., Wilkinson, D.M., Charman, D.J., Convey, P., Hodgson, D.A., Royle, J., Clauß, S. and Völcker, E. (2017). Taxonomic Implications of Morphological Complexity Within the Testate Amoeba Genus Corythion from the Antarctic Peninsula. Protist, Vol. 168, 565–585.