Cyclopyxis cylindrica Kufferath, 1932
Diagnosis: Shell in the shape of a cylindrical box, chitinous, formed of small scattered mineral grains, with some large graines making more or less marked protrusions. In lateral view, the shell is rectangular with slightly convex curved sides. Pseudostome is slightly pushed into the ventral side.
Dimensions: Test 65-67 µm in diameter, height 40 µm; aperture 20-22 µm wide.
Ecology: Africa, Barumbu.