Corythion tests - from  Roland et al. 2017

 

 

Genus Corythion Taranek, 1918

 

Diagnosis: test 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.

 

From Lueftenegger et al, 1988
 
Corythion dubium
C. dubium