Difflugia penardi Hopkinson, 1909
Diagnosis: Test short, with a semi-circular dome and wider in proportion th the length than D. lacustris, which in some respects it resembles; tapering convexly downwards from the fundus to the truncated pseudostome, covered with small mineral grains or diatoms frustules. Pseudostome round.
Dimensions: Length 60-85 µm, width about 30 µm.
Ecology: phagnum, Great-Brittain.
Remarks: According to Hopkinson, it may be mistaken for D. bacillifera.