Difflugia giganteacuminata (Chardez, 1958) Chardez et Gaspar, 1984
Diagnosis: Shell nearly cylindrical, always longer than 350 µm and with a large and long spine, which is at least 1/4 of the shell length.
Dimensions: Chardez & Gaspar (1984): 360-550 µm, spine 87-100 µm. My measurements: 419-468 µm.
Ecology: Sediment of ditches, between waterplants.
Remarks: I don’t know if this is a true species or only one of the many variations observed. Further observations are needed to make this clear. Just look at the three rows of shells below. They come from three different localities. The second one in the first row could be identified as D. giganteacuminata, if it was found without the other shells. It measures 429 µm. The same is true for shells in the other rows.