
D. echinulata, after Penard, 1911
Difflugia echinulata Penard, 1911
(=D. spinosa Stepanek, 1963)
Diagnosis: Shell oblong-oval, resembling the shape of an acorn and tapering toward the pseudostome. Numerous asymmetrically arranged hollow spines of varying shapes and sizes are located along the sides. It resembles D. immanata but is larger, with spines positioned asymmetrically rather than being confined to one side of the main axis, as in D. immanata. The pseudostome is round.
Dimensions: Penard (1911): Shell length 133-190 µm; width 63-100 µm; diameter of the aperture 33-45 µm.
Habitat: Freshwater, wet green mosses.