Lesquereusia bispiralis Thomas & Gauthier-Lièvre, 1959

Diagnosis: Neck with two septa. The neck is not cylindrical or conical, but abruptly bent, which causes a change in its direction: whereas at the beginning it followed the direction of the winding of the test, it is raised at an right angle, which gives it a distinctive and unusual appearance. The test is covered with quartz particles.

Dimensions: According to Thomas & Gauthier-Lièvre (1959): Shell length 300 µm; width 170 µm; aperture 50 µm.

Ecology: Freshwater.

Geographical distribution: Africa.

References: Thomas, R., Gauthier-Lièvre, L. (1959). Le genre Lesquereusia Schlumberger 1845 (Rhizopodes testacés). Bull. Soc. d’Hist. Nat. l’Afrique du Nord, 388, 50: 34-86.