Difflugia compressa Leidy, 1879

Diagnosis: Although Leidy (1879) refers to this as a variety of D. pyriformis, he uses the spelling Difflugia compressa. He states that the species matches the description of C. pyriformis, but is compressed.

Dimensions: Leidy (1879) reports a length of 60–580 µm for C. pyriformis, but this is not very credible, as he grouped many different shell shapes under this name.
Van Oye (in Rhizopodes du Grand-Duché de Luxembourg) reports Difflugia compressa with the following dimensions: height 150–210 µm; width 120–170 µm; pseudostome 45–50 µm.

Ecology: Freshwater.

D. compressa africana Gauthier-Lièvre & Thomas, 1958.
It differs from the typical form in larger sizes.
Length 220-280 µm, width 189-249 µm, thickness 136-155 µm, pseudostome diameter 55-58 µm.