Pentagonia maroccana Gauthier-Lièvre & Thomas, 1958

Diagnosis: Shell more or less cylindrical in appearance, but provided with 3 to 5 protruding, rounded longitudinal ribs; towards the upper third, this cylinder contracts strongly to form a slightly urceolate collar; the fundus of the body ends quite abruptly in a blunt-tipped horn. In some individuals, the longitudinal ribs may, a little before the bottom of the body, end in a divergent horn, identical to that of the bottom, and the presence of which widens the base and gives the shell a pear-shaped appearance. The cross section is triangular, quadrangular or irregular polygonal, with rounded corners. The pseudostome is small, circular, lined with neat quartz particles. The shell cover, similar to that of Difflugia, is made up of relatively small mineral particles, not overhanging, much smaller on the horns.

Dimensions: Length 65-95 µm; collar 5-8 µm; aperture 15-20 µm.

Ecology: Freshwater; Africa.