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Genus Matsakision

Shell is transparent, long ovoid, slightly compressed, perpendicularly truncated near the aperture area. Shell is covered by elliptic plates, not overlapping, although sometimes may be connected, located on light yellow hyaline cement. Aperture is terminal, oval, surrounded by small organic collar, hardly visible. Pseudopodia are not reported. Ecology: terrestrial mosses. Type species: Matsakision cassagnaui Bonnet, 1967