Hyalosphenia rectangularis Decloitre, 1965

Diagnose. Shell in broad view oval-elliptical at the aboral end and rectangular with rounded edges at the pseudostome end, transparent to yellowish. Shell bending sharply to almost square angles at the level of the pseudostome, which is thus much narrower than the test (ca. 1/3rd). Pseudostome elliptical with a thickened margin.

Dimensions: According to Decloitre (1965): Shell length 45–55 μm; width 30–32 μm; depth (in profile) 12–15 μm; aperture 10 μm.

Habitat: Not specified. Likely forest litter.

Geographical distribution: Congo, Africa.

References: Kosakyan, A., Meisterfeld, R., Lara, E., Duckert, C., Mitchell, E., 2025. A taxonomic monograph of hyalospheniid testate amoebae. Amoebozoa: Arcellinida: Hyalospheniformes, Mémoire XIV. Éditions Alphil-Presses universitaires suisses, Neuchâtel.