Lesquereusia carinata Playfair, 1917

Diagnosis: Shell embedded with endogenous or reworked regular elements, well joined, in the form of small rounded cushions (cushion-like pellets, sec. Playfair). The base of the body, which is rectilinear or slightly curved in lateral view, is shown in profile with a hull giving it the appearance of a ship’s keel; this hull is formed by the more or less significant acumination of the bottom of the body.

Dimensions: According to Playfair (1917): Shell length 133 µm; width 100 µm; aperture 36 µm; keel width 72 µm; keel height 13 µm. Thomas and Gauthier-Lièvre (1959): Length 132-135 µm; width 115—120 µm; aperture 35—38 µm; thickness 75—85 µm.

Habitat: Freshwater.

Geographical distribution: Australia, Madagaskar.

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